Maritime English
Maritime English Glossary
647 professional maritime english terms with definitions, pronunciation and examples. Learn what each term means — free with Termify.
C
- CPPネガティブピッチとは？ A controllable pitch propeller blade setting that provides astern thrust for stopping or reversing the vessel.
- CPPピッチゼロとは？ The position of a controllable pitch propeller (CPP) where the blades are aligned to produce no thrust, used for stoppin...
- CPPポジティブピッチとは？ A controllable pitch propeller blade setting that provides forward thrust, the amount adjusted for desired vessel speed ...
E
M
V
も
ア
- アジマススラスター・ロックとは？ A system state where azimuth thrusters are held in a fixed orientation to prevent movement, usually for safety during ma...
- アドバンス距離計算とは？ Determination of the longitudinal distance the vessel travels on the original heading during a turn from rudder order un...
- アプローチトラック検証とは？ Confirmation that vessel’s intended approach line aligns with planned track and pilot’s instructions before final manoeu...
- アプローチ距離マーカーとは？ Painted, lit, or electronic reference indicating remaining longitudinal distance to berth face during final approach.
- アンカーアウェイ確認とは？ The formal notification to the bridge or engine room that the anchor is clear of the seabed and ship is free to maneuver...
- アンカーウォークバック制御とは？ The controlled paying out of anchor chain in reverse (walkback) under power, used for precise anchor positioning or retr...
- アンカー巻上速度とは？ The speed at which the anchor cable is hauled in, usually measured in meters per minute, to control anchor recovery.
- アンカー流れとは？ Situation where a vessel’s anchor fails to hold and the vessel moves from its intended position, risking collision or gr...
- アンカー速度減速とは？ Deliberate decrease in vessel speed to a safe limit before anchor deployment, minimizing anchor dragging and ensuring pr...
- アンダーキール余裕調査とは？ Hydrographic assessment confirming minimum clearance between keel and seabed along planned passage meets safety criteria...
イ
- イナーティング操作とは？ The process of introducing inert gas into cargo tanks to reduce oxygen concentration, preventing flammable mixtures duri...
- イナートガスとは？ A non-flammable gas used to reduce the oxygen content in cargo tanks, preventing explosion risks during the transport or...
- イナートガス発生装置とは？ A shipboard unit that produces inert gas, primarily used on tankers to maintain a non-flammable atmosphere in cargo tank...
- インタークーラーディファレンシャルとは？ The pressure or temperature difference measured across the intercooler, used to detect fouling or blockages affecting en...
- イーズ トゥ ファイブとは？ Helm order instructing the helmsman to reduce rudder angle to five degrees while maintaining course adjustment.
ウ
- ウィンドエリア効果とは？ The influence of the ship’s exposed surface area above the waterline, causing increased drift or leeway under wind press...
- ウインチブレーキ保持力とは？ Certified static load that a mooring-winch brake can safely withstand without paying out when lines are under tension.
- ウェイポイントシーケンスアラームとは？ An alarm on navigation systems indicating failure to automatically advance to the next waypoint as programmed in the voy...
- ウォーターカットとは？ A measurement indicating the percentage of water present in a liquid cargo, essential for determining product quality an...
- ウォータージェット逆推力とは？ A manoeuvring action where the direction of waterjet propulsion is reversed, providing astern thrust for stopping or mov...
- ウラージュハッチとは？ A small tank opening used for manual ullage measurements and sampling of cargo on oil and chemical tankers.
- ウラージュ測定とは？ The process of measuring the empty space (ullage) in a cargo tank to determine the amount of liquid cargo loaded or rema...
エ
- エアドラフトクリアランスとは？ The vertical distance from the waterline to the highest point of the vessel, used to determine safe passage under bridge...
- エスコートタグ連結とは？ The established secured line or method by which an escort tug is physically connected to a vessel, typically for control...
- エスコート船とは？ A vessel assigned to accompany another ship for navigational assistance, safety, security, or regulatory compliance in p...
- エネルギー効率指数とは？ Calculated parameter (EEXI/EEOI) expressing CO₂ emitted per transport work, mandatory under IMO MARPOL Annex VI.
- エンジンインターロックシステムとは？ An automated safety mechanism that prevents certain engine operations unless predefined conditions are satisfied, protec...
- エンジンテレグラフ障害とは？ A failure or obstruction in the engine telegraph system, preventing bridge orders from being transmitted to the engine r...
- エンジンテレメトリーパネルとは？ A central control panel for monitoring, displaying, and logging engine performance parameters and alarms in real-time, o...
- エンジンデータロガーとは？ A device or software system that automatically records and stores key engine parameters for performance monitoring, diag...
- エンジン回転数設定とは？ The selected rotational speed at which a ship’s engine is set to operate, typically determined by bridge orders for mane...
- エンジン安全停止とは？ An automatic or manual action that stops the engine to prevent damage or hazard when critical parameters exceed safe lim...
- エンジン負荷分担とは？ The process of distributing electrical or mechanical load evenly between two or more engines or generators operating in ...
- エンジン負荷応答とは？ The manner and speed at which the main engine adapts to sudden changes in power demand, crucial for manoeuvring and heav...
オ
- オイルフェンスとは？ A floating barrier deployed to contain and control oil or chemical spills on the surface of the water.
- オイルミスト検知器とは？ A fixed device that continuously monitors and detects oil mist concentrations in engine crankcases to prevent explosions...
- オイル放出モニターとは？ An electronic device used to measure and control oil content in discharged water, ensuring compliance with MARPOL and po...
- オーバーフィルアラームとは？ An automatic safety device that activates an audible and visual alert when liquid in a tank approaches a critical high l...
カ
- カーゴサンプリングとは？ Procedure for collecting representative samples of cargo for quality analysis, documentation, and regulatory compliance.
- カーゴシーケンシングとは？ The planned order and timing for loading, transferring, or discharging cargoes in different tanks to maintain stability ...
- カーゴドレイニングとは？ Controlled removal of cargo residues or small remaining quantities from tanks and lines after main discharge, ensuring t...
- カーゴドレイニングとは？ Removal of cargo residues or small quantities from tanks and pipelines after main discharge, ensuring tanks are as empty...
- カーゴブレンディングとは？ The controlled mixing of different cargoes or grades in a tank to achieve a specified product quality or specification, ...
- カーゴホースとは？ A flexible hose designed for transferring liquid cargo between ship and shore, constructed and tested for strength and c...
- カーゴマニホールドとは？ A pipe assembly on a ship’s deck used for connecting shore hoses and controlling the transfer of liquid cargo to or from...
- カーゴ互換性とは？ Assessment of whether different cargoes can be safely loaded, carried, or stored together without risk of dangerous chem...
- カーゴ加熱とは？ The controlled application of heat to cargo in tanks to maintain pumpability and product quality, especially with heavy ...
- カーゴ脱水とは？ The process of removing water from cargo, especially crude oil, by settling, heating, or chemical means, to meet quality...
- カーゴ脱水とは？ The process of removing water from cargo, especially crude oil, by settling, heating, or chemical means to meet quality ...
- カーゴ膨張とは？ The increase in cargo volume due to temperature rise, requiring careful calculation and monitoring to avoid overflow or ...
ガ
- ガスフリー作業とは？ The process of removing hazardous or toxic vapours from tanks by ventilation, rendering them safe for entry, inspection,...
- ガス検知パネルとは？ A monitoring system that displays real-time readings from gas detectors, providing alarms if hazardous or flammable gas ...
- ガバナ応答テストとは？ A routine operational test to verify that the engine speed governor responds correctly to load changes, ensuring engine ...
- ガードチャンネルとは？ A designated VHF radio frequency used for emergency, distress, or mandatory communication monitoring.
キ
- キックバックラインとは？ A pipeline connecting cargo manifold or transfer system back to the tank, used for circulation or pressure control durin...
- キックバックラインとは？ A pipeline connecting the manifold or transfer system back to a tank, used for circulating cargo, line clearing, or pres...
- キャプスタン引張能力とは？ Maximum continuous line-pull that a deck capstan can exert when hauling mooring lines at rated speed.
- キール下余裕距離とは？ Vertical distance between the lowest point of a vessel’s keel and the seabed referenced to chart datum; the key safety m...
ク
- クアドラント捜索とは？ A systematic search pattern, typically used in SAR operations, covering four quadrants from a datum point to locate pers...
- クイックストップ操船とは？ Emergency procedure whereby engine is set full astern and helm hard over to rapidly stop vessel’s forward motion within ...
- クッション効果推定とは？ An assessment of the air or water pressure that builds up between a vessel and the berth or another vessel, influencing ...
- クランクケース爆発リリーフ弁とは？ A safety device fitted on engine crankcases that vents pressure and flame in the event of a crankcase explosion, reducin...
- クリアランスなしとは？ Notification that the vessel does not have authorization or permission to enter, leave, or transit a specific area, port...
- クロストラックエラーとは？ The perpendicular distance between a vessel's actual position and the planned track line, used for navigation accuracy.
- クローズドゲージングとは？ A method of measuring tank levels or taking samples without exposing tank contents to the atmosphere, using closed devic...
- クローズドベンティングとは？ Method of venting tank vapours through a controlled, closed system to prevent release of gases to the atmosphere, comply...
- クローズドローディングとは？ A cargo transfer method where tanks are loaded via closed systems to prevent vapour emissions, following ISGOTT and MARP...
グ
サ
- サイクロン警報とは？ Official alert issued when a tropical cyclone with gale-force winds is expected to affect a maritime area within 24 hour...
- サイドスリップ角監視とは？ Continuous observation of vessel’s lateral drift angle relative to track to ensure safe approach trajectory during docki...
- サクション効果推定とは？ The assessment of negative pressure that draws a vessel toward another object or structure during close-quarter manoeuvr...
- サージモーション制御とは？ Management of longitudinal oscillations of vessel while moored, using winch tension adjustments or tug assistance to pre...
- サージ圧とは？ A sudden increase in pressure within a cargo pipeline or tank, usually caused by rapid valve closure or pump operation, ...
- サーマルオイルヒーターとは？ A unit designed to heat thermal oil used as a medium for transferring heat to fuel tanks, cargo systems, or other shipbo...
シ
- シャフト出力制限とは？ A set operational restriction on the maximum shaft power output, typically to comply with EEXI and MARPOL Annex VI energ...
- シャフト回転計とは？ A device or system that records the number of revolutions of the propulsion shaft, providing critical speed and distance...
- シリンダーオイル供給とは？ The controlled supply of lubricating oil to the main engine cylinder liners, essential for reducing friction and wear, a...
- シリンダーカットアウトとは？ A control action or device used to disable fuel supply to a cylinder, usually for maintenance or troubleshooting, while ...
- シーチェストバルブとは？ A seacock or valve fitted at the hull sea chest, controlling seawater intake for engine cooling, ballast, or firefightin...
ジ
- ジャイロコンパスエラーとは？ An inaccuracy or malfunction of the ship’s gyro compass, resulting in incorrect heading information displayed to bridge ...
- ジャイロ不安定とは？ A warning that the vessel’s gyrocompass cannot be trusted for accurate heading information.
- ジャケット冷却水とは？ The fresh water circulating through the engine’s cylinder jacket to absorb heat and prevent overheating during operation...
- ジョイスティック操船モードとは？ A control setting that allows a vessel to be steered and positioned using a joystick, integrating thrusters and main pro...
ス
- スイングを確認とは？ Helm or mooring order to observe and, if necessary, limit or arrest the vessel's swinging motion, especially when turnin...
- スクリューに異物とは？ A condition where the propeller is entangled with ropes, nets, or debris, affecting maneuverability.
- スクワット効果余裕とは？ The additional draught margin applied to account for the increased draught of a vessel due to the squat effect in shallo...
- スコールライン警報とは？ Notification that organised line of squalls with gusts ≥ 34 kn is approaching, often ahead of cold front.
- スタートエアコンプレッサーとは？ A compressor that supplies high-pressure air for starting main and auxiliary engines, essential for engine readiness and...
- スターボードの綱を放てとは？ Mooring command to release or cast off the starboard (right) mooring line or cable.
- スターンウェイスピードアラームとは？ An alarm triggered when a vessel's sternway (reverse movement) exceeds a preset speed threshold, alerting crew to possib...
- スターンタグ位置とは？ The designated location of a tug at the stern of a vessel, used to provide pulling or braking force during manoeuvring, ...
- ストリッピングポンプとは？ A pump specifically used for removing remaining cargo or residues from tanks, pipelines, or bilges after main discharge ...
- ストリッピングラインとは？ A dedicated pipeline onboard a tanker used to remove the final residues or small quantities of cargo remaining in tanks ...
- スラスターランダウンとは？ The process of safely reducing thruster power and shutting down the units after manoeuvring or while leaving station kee...
- スラスターランナップとは？ A procedure where thrusters are gradually powered up and tested before being engaged for manoeuvring or station keeping.
- スラスター効率係数とは？ A calculated ratio indicating how effectively a vessel’s thruster converts power input into thrust for manoeuvring opera...
- スリップウェイ進入コースとは？ The planned or observed vessel path when aligning for entry onto a slipway, critical for safe launching or hauling opera...
- スリップ計算モードとは？ A navigational mode where a vessel’s slip—the difference between theoretical and actual movement—is monitored and calcul...
- スロッシング評価とは？ Evaluation of the movement and impact of liquid cargo within a tank caused by ship motion, to assess risks of structural...
- スロップ処理とは？ The onboard process of managing and separating oil residues, tank washings, and mixtures for discharge or retention in s...
- スローアヘッドベルとは？ The engine telegraph order for slow speed ahead, typically used during precise manoeuvring, docking, or when entering co...
- スートブロワ操作とは？ The process of using a soot blower system to remove accumulated soot from boiler tubes or exhaust gas economizers, ensur...
タ
- タグボート支援要請とは？ Formal VHF or written message from vessel or pilot to harbour authority asking for specified tug support for manoeuvring...
- タグライン張力とは？ The force applied to a tow or mooring line connecting a tug to a vessel, monitored to ensure safe and effective manoeuvr...
- タグリードチェンジとは？ The coordinated operation in which a tug alters its line connection point or position to adapt to new towage requirement...
- タグ配置計画とは？ A detailed arrangement indicating the number, type, and position of tugs assigned to assist a vessel during berthing, un...
- タンクサウンディングシステムとは？ An electronic or manual system for measuring liquid levels in ship tanks, such as fuel, ballast, or fresh water, to ensu...
- タンクスカベンジングとは？ Process of removing residues or remaining liquids from cargo tanks after discharge, often using air, inert gas, or pumps...
- タンクパディングとは？ Process of introducing inert gas (often nitrogen) into the tank vapor space to maintain safe conditions, prevent air ing...
- タンクレーダーとは？ Radar-based electronic device for real-time measurement of cargo tank level, ullage, or interface, providing accurate, n...
- タンク再循環とは？ The process of circulating cargo within a tank, using pumps and pipelines, to maintain uniform temperature and prevent s...
- タンク加圧とは？ Maintaining a set positive pressure in a cargo tank, often using inert gas, to prevent air entry and reduce fire or expl...
- タンク換気とは？ The controlled release of vapours from a cargo tank through dedicated venting systems to prevent overpressure or vacuum ...
- タンク雰囲気とは？ The composition and quality of gases present inside a cargo tank, monitored to ensure safety from flammable, toxic, or i...
- ターボチャージャー整備とは？ Scheduled inspection, cleaning, and servicing of the engine turbocharger to ensure optimal performance and prevent break...
- ターミナル連絡員とは？ The appointed person or office responsible for communication and coordination between ship and terminal during cargo ope...
- ターミナル連絡員とは？ The person or office responsible for communication and coordination between ship and terminal during cargo operations.
- ターンレート予測計とは？ ECDIS or radar-derived graphic that projects vessel’s future position based on present speed and rate of turn settings.
ダ
チ
- チャンネル16とは？ The international VHF radio distress, safety, and calling channel (156.8 MHz) monitored at all times by ships and shore ...
- チャンネル16とは？ The international VHF radio distress, safety, and calling frequency (156.8 MHz) mandatory for all seagoing vessels to mo...
- チャンネルを変えてくださいとは？ Instruction to switch VHF radio communications from one designated channel to another for operational or traffic managem...
- チャンネル混雑とは？ Notification that the selected VHF working channel is congested with traffic, making immediate communication difficult.
デ
- ディーゼルオイルタンクとは？ A dedicated tank for storing diesel oil, used for main engines, auxiliary engines, or emergency generators on board ship...
- デッドスローアスターンとは？ Engine telegraph order instructing propulsion at the lowest possible speed astern, used for delicate reversing or while ...
- デッドスローアヘッドとは？ Engine telegraph order instructing propulsion at the lowest possible speed ahead, used for delicate manoeuvring or conge...
ド
- ドッキングランプ勾配とは？ The measured incline of a docking ramp, influencing the safe entry, exit, and support of a vessel during docking or undo...
- ドラフトサーベイとは？ A method of determining the weight of cargo loaded or discharged by measuring the vessel’s draft marks before and after ...
- ドリップトレイとは？ A shallow container placed beneath piping joints or hoses to catch leaks or drips during cargo transfer operations and p...
- ドリフト角アラームとは？ Navigation sensor alert triggered when vessel’s leeway or sideslip exceeds predefined safe threshold relative to track.
- ドロップラインとは？ A flexible line or pipe used to transfer liquids vertically in a tank, commonly for sampling, loading, or discharging at...
ハ
- ハイドロフォア圧力タンクとは？ A pressurized tank in a ship’s fresh water system that maintains constant water pressure for domestic and service use th...
- ハリケーンフォース風とは？ Wind of Beaufort scale 12 (≥ 64 kn) producing phenomenal seas; reported in Metarea bulletins as force 12.
- ハリケーン警報とは？ A formal announcement by maritime or meteorological authorities indicating that hurricane conditions, including very hig...
- ハードスターボードとは？ Helm order instructing the rudder to be put fully to starboard (right) for maximum turning effect.
- ハードポートとは？ Helm order instructing the rudder to be put fully to port (left) for maximum turning effect.
- ハーフアヘッドベルとは？ Engine telegraph order instructing propulsion at half engine speed ahead, used for moderate manoeuvring or departure fro...
バ
- バイオファウリング管理計画とは？ A documented system required by IMO for vessels to manage and minimize the accumulation of aquatic organisms on hulls an...
- バウスラスター使用とは？ Use of bow thruster to generate lateral force at bow for precise positioning or counteracting environmental forces durin...
- バウタグ位置とは？ The assigned and maintained location of a tug at the bow of a vessel to provide pushing, pulling, or steering assistance...
- バウモーメント係数とは？ A calculated factor describing the turning moment generated by the bow, crucial for assessing vessel manoeuvrability dur...
- バターワースマシンとは？ A mechanical rotating cleaning device used for washing and gas freeing ship cargo tanks using pressurized jets of water ...
- バラストポンプ自動とは？ An automatic mode setting on the ballast pump, enabling the pump to start and stop based on tank level sensors or a cent...
- バラスト交換とは？ The procedure of replacing ballast water taken from one area with water from another, to minimize the spread of invasive...
- バラスト水交換とは？ Operation of replacing loaded ballast with mid-ocean water at prescribed distance from land to prevent bio-invasion, log...
- バンククッション効果とは？ Hydrodynamic phenomenon where water pressure between a vessel and a nearby bank creates a cushion, pushing the bow away ...
- バンクサクション効果とは？ Hydrodynamic phenomenon where a vessel navigating close to a bank experiences a suction force pulling the vessel toward ...
- バーギービット報告とは？ An official communication or broadcast of the sighting and position of medium-sized floating ice fragments (bergy bits),...
- バースアラインメント灯とは？ Pair or range of fixed shore lights that provide visual guidance to vessels for centreline alignment during final approa...
- バース適合性チェックとは？ A verification process to ensure the selected berth meets vessel requirements in terms of depth, length, fendering, and ...
パ
- パイロットに通知とは？ Request for instructions, information, or confirmation from the maritime pilot regarding navigation or maneuvers.
- パイロットラダー設置済とは？ A pilot ladder correctly secured and deployed over the ship’s side, ready for safe boarding or disembarkation of the pil...
- パイロット乗船とは？ Designated process and location where a maritime pilot embarks or disembarks from a vessel.
- パイロット乗船海域とは？ A designated area, marked on charts, where the pilot boards or disembarks from a vessel, usually at port approaches or f...
- パイロット航路計画とは？ A detailed route plan, prepared jointly by the master and pilot, outlining intended track, waypoints, speed, and manoeuv...
- パラレルインデックスラインとは？ A radar-derived reference line drawn parallel to the vessel's intended track, used to monitor cross-track error by keepi...
- パラレルインデックス法とは？ A radar navigation technique in which fixed radar echoes are kept on predetermined parallel lines to verify the vessel r...
- パワーテイクオフとは？ A mechanical device that transfers engine power to auxiliary equipment such as generators or pumps, typically via a shaf...
- パージバルブとは？ A valve used to expel unwanted gases or residues from cargo lines, tanks, or machinery spaces, ensuring safe and inert c...
ピ
- ピグレシーバーとは？ A pressure vessel or chamber installed at the end of a pipeline to receive the pig after cleaning, used in cargo or ball...
- ピグレシーバーとは？ A pressure vessel or chamber at the end of a pipeline to receive the pig after cleaning or product transfer, used in car...
- ピストンゲージとは？ A pressure measurement device using a piston and cylinder assembly, typically used to calibrate pressure systems on tank...
- ピッチングモーメント制御とは？ The regulation of longitudinal pitching moments of a vessel, using ballast or thrusters, to ensure stability and reduce ...
フ
- フェアウェイセンターラインアライメントとは？ The practice of steering a vessel so that its longitudinal axis remains aligned with the designated navigational centrel...
- フェアウェイターンベイスンとは？ A designated widened section of a navigational fairway, specifically constructed to allow vessels to safely turn or chan...
- フェンダーエネルギー吸収とは？ Capacity of berth fender system to absorb kinetic energy of vessel at specified berthing velocity without exceeding desi...
- フェンダーパネル接触とは？ The point or process where the vessel's hull makes contact with the berth fender panel, usually monitored to avoid struc...
- フットバルブとは？ A non-return valve installed at the lower end of a suction line in cargo or ballast tanks, designed to prevent backflow ...
- フルアヘッドベルとは？ Engine telegraph order instructing propulsion at full engine speed ahead, typically used in open sea or to quickly gain ...
ブ
- ブリッジウイングクリアランスとは？ Minimum air gap required between ship’s bridge wing extremities and shore structures or lock walls during manoeuvring.
- ブリッジエンジンテレグラフとは？ A signaling system between bridge and engine room, used to transmit engine speed and direction orders during ship maneuv...
- ブリッジリソースマネジメントとは？ The effective use and coordination of all available bridge resources—personnel, equipment, and information—to ensure saf...
- ブリッジ制御の移管とは？ The formal procedure to transfer vessel control (steering and propulsion) between the bridge and alternative control sta...
- ブリッジ制御モードとは？ A mode in which the propulsion and critical machinery are operated directly from the bridge, with command transferred fr...
- ブリッジ待機中とは？ Notification that the navigating bridge watch is monitoring the working channel and ready to respond immediately.
- ブリッジ操船ノートとは？ A logbook kept on the bridge for recording all manoeuvring orders, engine telegraph movements, helm commands, and critic...
- ブリッジ火災パネルとは？ A control panel located on the bridge showing status, zones, and alarms for the ship’s fire detection and suppression sy...
- ブリッジ緊急ロッカーとは？ A secured storage location on the bridge containing emergency gear such as fire axes, breathing apparatus, and communica...
- ブリッジ航海当直とは？ A continuous period during which designated officers and crew maintain vigilance and operational control on the bridge t...
- ブリッジ音声記録とは？ Continuous audio recording of all conversations and alarms on the bridge as mandated by SOLAS for investigation and safe...
プ
- プロペラウォーク評価とは？ Evaluation of sideways movement (walk) caused by propeller rotation while making headway or sternway at low speed.
- プロペラガード点検とは？ Inspection of the propeller guard for integrity and correct positioning before manoeuvring or departure, ensuring safe p...
- プロペラピッチ同期とは？ Matching of pitch angles on controllable-pitch propellers to balance thrust and avoid yaw during twin-screw operations.
ヘ
ベ
- ベクターチャート表示とは？ An electronic navigational chart presented in vector format, enabling interactive layers and detailed, scalable map feat...
- ベーパコントロールとは？ System and procedures used to contain, monitor, and safely manage vapours generated during loading or discharging of car...
- ベーパリターンとは？ A pipeline or hose system connecting ship and shore to return displaced cargo vapours to the terminal during loading.
- ベーパーエミッションとは？ Release of vapours from cargo tanks or lines, controlled and monitored to prevent hazardous exposure, pollution, or brea...
- ベーパーサンプリングとは？ Procedure to collect representative samples of vapour from tanks or lines for safety, quality, or regulatory compliance ...
- ベーパーサンプリングとは？ Procedure to collect samples of vapour from tanks or lines for safety, quality, or regulatory compliance testing.
- ベーパーロックとは？ A condition where vapor forms in a pipeline or pump, blocking the flow of liquid cargo and potentially disrupting operat...
ホ
- ホイールオーバーアラームとは？ An electronic or mechanical alarm that notifies the bridge team when it is time to initiate the wheel-over manoeuvre, us...
- ホワイトアウト警報とは？ A warning indicating that visual navigation is severely hindered due to uniformly diffuse light caused by snow, ice, or ...
- ホーステストとは？ The procedure of pressure-testing cargo hoses with water or air before use to ensure integrity and compliance with inter...
- ホース接続とは？ The act of securing cargo hoses between ship and shore, or between tanks and manifolds, ensuring a leak-free and safe ca...
ボ
- ボイラーバーナー管理とは？ The control and monitoring of burner operations on marine boilers to ensure safe and efficient ignition, combustion, and...
- ボイラー低水位とは？ A hazardous boiler condition where water level falls below the minimum safe mark, risking tube overheating, boiler damag...
- ボトムサンプリングとは？ The process of collecting liquid samples from the bottom of a cargo tank to check for water, contaminants, or stratifica...
- ボラードプル確認とは？ Confirmation that a tug’s certified bollard-pull matches terminal requirements before allocating towage tasks.
ポ
- ポンプカップリングガードとは？ A mechanical safety cover installed over rotating pump couplings to prevent injury and contain parts in the event of fai...
- ポンプストレーナーとは？ A filtering device fitted to the suction side of cargo or ballast pumps to prevent entry of solid particles and debris t...
- ポンプルーム換気とは？ The process and system for providing safe airflow in the pump room to prevent accumulation of explosive vapors and maint...
- ポンプ性能とは？ Assessment and monitoring of cargo pump efficiency, capacity, and operation to ensure optimal transfer rates and detect ...
マ
- マスターパイロットエクスチェンジとは？ A formal communication process between the ship’s master and the pilot to share essential navigation information, plans,...
- マニホールドクロスオーバーとは？ A pipe or valve arrangement that allows transfer between different cargo manifolds, enabling flexibility in cargo handli...
- マニホールドクロスオーバーとは？ A pipe or valve arrangement that allows transfer between different cargo manifolds for flexible or emergency cargo handl...
- マニホールド圧力とは？ The pressure measured at the cargo manifold during loading or discharging, crucial for monitoring safe and efficient car...
ミ
メ
ラ
- ライブパイロットプラグとは？ An active data connection port on the bridge that provides real-time navigational data from the ship's ECDIS or AIS syst...
- ラインを一本にとは？ Order to reduce the number of mooring lines on each bollard to one, preparing the vessel for departure.
- ラインディスプレースメントとは？ The process of clearing a pipeline by pushing cargo or liquid out with another medium, usually to ensure product segrega...
- ラインピギングとは？ Mechanical cleaning of pipelines using a device known as a 'pig' to remove residues or blockages and ensure efficient fl...
- ラインフラッシングとは？ Process of cleaning cargo or ballast pipelines by circulating water, air, or another fluid to remove remaining product a...
- ラインフラッシングとは？ Process of cleaning pipelines by circulating water, air, or another fluid to remove product and contaminants.
- ラジオファクス図受信とは？ Confirmation that a complete facsimile weather chart has been successfully received via HF radio and is ready for naviga...
リ
- リフラックスバルブとは？ A valve installed to control the return flow of condensed vapors or liquids back into a tank or system for process or sa...
- リーウェイ角推定とは？ The calculated or visually assessed angle between a vessel’s heading and actual course over ground, caused by wind or cu...
- リード角補正とは？ Adjustment applied to ship’s heading to offset predicted set and drift so that actual track leads planned approach line.
レ
- レンジライトアライメントとは？ The navigation technique of steering a vessel so that two range lights, one behind the other, appear vertically aligned,...
- レーザードッキングシステムとは？ High-precision laser array projecting range and angular deviation data to vessel displays for centimetre-level berthing ...
- レーダーエコーオフセットとは？ The adjustment of the radar image to compensate for systematic error or offset, ensuring true target positions correspon...
- レーダーオーバーレイ表示とは？ The presentation of radar information directly on the electronic chart display, enabling visual correlation of radar tar...
- レーダーゲージングとは？ Use of radar technology to measure tank level, ullage, or interface without contact, widely used for precise monitoring ...
- レーダープロットマニュアルとは？ A publication or onboard manual containing standardized instructions, techniques, and worksheets for manually plotting r...
- レート安定化モードとは？ Autopilot setting that dampens oscillations by keeping rate of turn constant once a target value is reached during manoe...
ロ
- ローカルコントロールスタンドとは？ A designated engine room console enabling manual operation and monitoring of main engine or machinery independently of t...
- ローカル交通とは？ Vessels operating within a port, harbour, or defined coastal area, often with priority rules or reporting obligations fo...
- ローディケーター点検とは？ A procedure to verify cargo and ballast loading plans and actual weights using a shipboard stability calculator (loadica...
- ローディングアームとは？ A movable articulated mechanical arm used at terminals to transfer liquid cargo between ship and shore through the cargo...
- ローディングシーケンスとは？ The planned order and method for loading cargoes into tanks to maintain vessel stability, prevent contamination, and com...
- ローディングシーケンスとは？ The planned order and method for loading cargoes into tanks to maintain stability, prevent contamination, and comply wit...
- ローディングマスターとは？ The senior person responsible for supervising all cargo operations on board a tanker during loading, ensuring safety, co...
- ロードオントップとは？ A cargo operation method in which the slops or residues in a tank are allowed to settle and then new cargo is loaded abo...
- ロードライン遵守とは？ The act of ensuring that a vessel's draft and freeboard remain within limits set by the assigned Plimsoll mark and inter...
主
- 主エアレシーバーとは？ A large pressure vessel that stores compressed air for main engine starting and other critical pneumatic systems, mainta...
- 主機インジケータとは？ An instrument that displays key operational parameters of the main engine, such as load, RPM, and cylinder pressures, ai...
- 主機スタンバイとは？ Order for main engines to be ready for immediate use, typically before departure, arrival, or manoeuvring.
- 主機停止とは？ Engine telegraph order to cease all propulsion; used when vessel is to remain stationary or fully secured at berth.
- 主機制御とは？ The central console or system used to monitor and operate the ship’s main propulsion engine, including remote start, sto...
- 主機逆転とは？ A maneuver in which the main engine’s rotation direction is reversed, allowing the ship to go astern or stop.
- 主軸受油とは？ Lubricating oil supplied to the main engine's main bearings, essential for reducing friction and preventing overheating ...
- 主配電盤とは？ The primary electrical distribution panel on board controlling power supply to all vital systems and equipment, designed...
乗
- 乗組員用救命艇とは？ A life-saving craft, such as a lifeboat or liferaft, carried on board and designated for the emergency evacuation and su...
- 乗組員集合とは？ The assembly of all crew at designated muster stations for roll-call, instruction, or emergency drill, as per muster lis...
- 乗船人数とは？ Total count of persons (crew and passengers) on board, often requested for safety or SAR purposes.
予
位
- 位置の整合性監視とは？ Continuous verification of the reliability and accuracy of the ship’s position as provided by navigation systems.
- 位置を確認とは？ Instruction or request to verify the vessel's current navigational position using all available means, including GPS, ra...
- 位置を確認してくださいとは？ Instruction to confirm that a vessel’s reported navigational position has been received and understood.
- 位置不確かとは？ Phrase used to indicate that the vessel's current navigational position cannot be reliably confirmed and may be inaccura...
- 位置決定中止とは？ Command to discontinue planned position fixing process when results are unreliable or time-critical manoeuvre takes prio...
- 位置確認とは？ Request or instruction to verify and report the current location of a vessel, typically in latitude and longitude.
- 位置通過とは？ Notification that a vessel has just crossed or gone abeam of a specified position, buoy, or waypoint.
低
係
- 係留作業とは？ All procedures related to securing or unmooring a vessel to or from a berth, buoy, or anchorage.
- 係留張力監視とは？ Real-time supervision of static and dynamic loads on mooring lines to maintain safe tension limits under environmental f...
- 係留索取扱いとは？ The operation of preparing, passing, securing, and tending mooring lines to assist in berthing or unberthing a vessel.
全
- 全ての綱を放てとは？ Final order to release all mooring lines, allowing the vessel to depart from berth.
- 全ステーションとは？ Universal radio call addressing every vessel or station within radio range, especially for navigational warnings or urge...
- 全地球航法システムとは？ A satellite-based navigation system such as GPS, GLONASS, Galileo, or BeiDou, providing worldwide position, navigation, ...
到
動
- 動作基準ユニットとは？ A device that detects and reports a vessel’s six degrees of motion, used to support dynamic positioning and other naviga...
- 動的ポジショニング保持とは？ A control mode where a vessel maintains its heading and position automatically using thrusters and propellers, essential...
- 動的喫水余裕とは？ An additional draught margin included to account for dynamic effects such as squat, trim, and vessel movement in shallow...
危
- 危険区域とは？ A specified maritime zone where navigation is hazardous due to military exercises, wrecks, shallow waters, or other dang...
- 危険区域とは？ A specific zone designated as hazardous to navigation due to wrecks, shoals, operations, or other maritime risks; marine...
- 危険貨物とは？ Any substance or material that poses a significant risk to health, safety, or property during transport by sea, as defin...
圧
大
始
安
実
寒
座
引
- 引き潮予測とは？ Tabulated forecast time and rate of falling tide current used for harbour passage planning.
- 引き続き傾聴とは？ Instruction to keep monitoring a specified VHF radio channel or other communication line for further traffic or safety m...
- 引き続き聴取とは？ Instruction to maintain a listening watch on a specified VHF channel for further communication or safety messages.
強
- 強烈暴風警報とは？ Official GMDSS warning message indicating winds ≥ Beaufort 10, heavy seas and reduced visibility within forecast area.
- 強風下の接岸とは？ A berthing operation performed in high wind conditions, requiring specific techniques, increased tug assistance, or thru...
- 強風警報とは？ A warning issued to mariners when sustained winds of Beaufort Force 8 or higher (34–40 knots) are expected or occurring ...
後
- 後方クリアランスとは？ The available unobstructed distance behind the vessel, critical for manoeuvring astern.
- 後進するとは？ Order or report indicating the vessel is moving, or must move, backward relative to its heading.
- 後進出力予備とは？ Remaining astern propulsion capacity beyond that required for standard manoeuvre, ensuring additional stopping margin.
- 後進慣性確認とは？ Verification manoeuvre carried out to ensure the vessel’s astern power can promptly overcome residual forward momentum b...
応
排
- 排ガスボイラーとは？ A heat recovery unit using main engine exhaust gases to generate steam for shipboard heating or auxiliary systems, integ...
- 排出規制海域とは？ Designated sea region where MARPOL Annex VI limits on SOx, NOx and PM apply; requires low-sulphur fuel or equivalent aba...
- 排気温度センサーとは？ A device that measures and transmits the temperature of exhaust gases, crucial for monitoring engine performance and pre...
接
推
- 推力配分モデルとは？ A computational approach for optimally distributing propulsion thrust among multiple thrusters to achieve desired vessel...
- 推奨交通レーンとは？ A charted route within a traffic separation scheme or recommended track designed for the safe passage of vessels, but no...
- 推進制御パネルとは？ The main interface on the bridge or in the engine room for controlling the vessel’s propulsion system, including speed, ...
- 推進力喪失とは？ Loss of ability to propel the vessel due to engine failure or other mechanical issues.
損
- 損傷を報告とは？ Instruction to inform relevant authorities or stations of any structural, mechanical, or environmental damage sustained,...
- 損傷制御とは？ The procedures and measures to limit, manage, or repair damage on board, especially after collision, flooding, fire, or ...
- 損傷対策ロッカーとは？ A secured storage area on board for tools, plugs, and equipment needed for rapid response to hull damage, flooding, or e...
- 損傷対策班とは？ A designated team trained and tasked to control flooding, fire, or structural damage during emergencies on board.
- 損傷評価とは？ A structured evaluation of damage sustained by a vessel after an incident, including extent, location, and impact on sea...
操
- 操縦レバー位置とは？ The selected position of the manoeuvring lever on the bridge or engine control console, determining direction and speed ...
- 操舵フィードバックループとは？ A control system that continually monitors rudder position and vessel heading to automatically correct steering and main...
- 操舵装置切替とは？ The act of switching from one steering gear system or power unit to another, often for redundancy or in case of equipmen...
- 操舵面統合とは？ The coordinated operation of rudders, stabilisers, and other movable surfaces to achieve optimal vessel steering and sta...
- 操船速度確認とは？ The process of verifying and confirming the vessel’s speed through the water is suitable for safe manoeuvring during ber...
方
旋
- 旋回バイアス補正とは？ The adjustment made to compensate for a vessel’s natural tendency to turn more easily in one direction due to hull desig...
- 旋回中心推定とは？ Calculation of the vessel’s instantaneous longitudinal pivot point to predict turn characteristics in low-speed manoeuvr...
- 旋回円直径とは？ The distance perpendicular to the original track between tangents of the vessel’s path when executing a steady-turn at a...
暴
最
横
- 横力補正計画とは？ A navigational strategy to counteract lateral forces (wind, current, propeller wash) that may cause a vessel to drift si...
- 横推力補正とは？ The adjustment applied to helm or engine orders to compensate for the sideways force exerted by a propeller, especially ...
- 横揺れ周期推定とは？ An evaluation of the time taken for a vessel to complete one full roll oscillation, essential for stability analysis and...
- 横方向プロペラ効果とは？ Side-force generated by propeller rotation causing yaw, especially stern kick to port or starboard when powering ahead o...
- 横逸制御とは？ Active steering or thruster management to prevent a vessel from swinging away (sheering off) from its intended track or ...
機
- 機関室ワッチとは？ The assigned period when crew are stationed in the engine room to monitor, operate, and respond to machinery and alarms,...
- 機関室換気とは？ The provision and regulation of air flow to the engine room to remove heat, fumes, and ensure safe working conditions, a...
- 機関室浸水とは？ The presence or rapid ingress of water in the engine room spaces, posing a serious risk to machinery and vessel safety, ...
- 機関室警報とは？ An audible and/or visual signal in the engine room, indicating an abnormal or hazardous condition in machinery, systems,...
- 機関室隔離とは？ The process or system of segregating the engine room from other compartments to contain hazards such as fire, flooding, ...
- 機関故障とは？ A condition in which a vessel’s propulsion machinery is malfunctioning or unreliable, possibly affecting speed and manoe...
気
- 気圧傾向報告とは？ Synoptic code group summarising rate and character of atmospheric pressure change during past three hours, broadcast in ...
- 気圧報告とは？ Regularly transmitted statement of current atmospheric pressure and trend for meteorological data exchange and storm tra...
- 気象符号報告とは？ A standardized numerical weather message (per WMO/IMO) reporting synoptic-scale observations, transmitted by ships for m...
- 気象通報とは？ Official broadcast of weather conditions, warnings, and forecasts relevant to maritime navigation.
水
- 水上竜巻警報とは？ An official maritime bulletin advising of the risk of waterspout formation in a specific sea area, requiring heightened ...
- 水密度補正とは？ The adjustment made to vessel loading or draught calculations to account for local water density, affecting buoyancy and...
- 水深警報とは？ An alert activated when the measured depth beneath a vessel approaches a pre-set minimum, used to avoid grounding.
- 水路に進入してくださいとは？ Instruction to enter and follow a designated fairway or channel for safe navigation as directed by VTS or port authority...
- 水路占有中とは？ Notification that a fairway or navigation channel is temporarily blocked or being used by another vessel, requiring othe...
氷
- 氷圧リッジ警報とは？ A notice regarding the formation or presence of elevated ice ridges on sea ice, which may pose navigational hazards to v...
- 氷山漂流予報とは？ A prediction of the future movement and position of icebergs in a given maritime area, based on meteorological and ocean...
- 氷着スプレー警報とは？ GMDSS meteorological warning that sea spray will freeze on exposed surfaces causing topside icing hazards.
- 氷縁報告とは？ Update giving the geographic position of the ice edge separating open water from pack ice, critical for polar routing.
- 氷雨警報とは？ GMDSS forecast message indicating super-cooled rain likely to freeze on contact, causing rapid ice accretion on decks an...
油
- 油による汚染とは？ Presence or discharge of oil into marine waters from a vessel or facility, constituting a reportable incident and requir...
- 油圧オイルクーラーとは？ A heat exchanger used to maintain the temperature of hydraulic oil within safe operating limits for reliable system perf...
- 油流出警報とは？ Immediate notification that mineral oil is observed on sea surface requiring containment and reporting under MARPOL 73/7...
沿
- 沿岸交通ゾーンとは？ A coastal area, adjacent to the landward side of a traffic separation scheme, intended for use by vessels not using the ...
- 沿岸定着氷拡大とは？ Rapid seaward growth of shore-fast ice, restricting manoeuvring space and increasing risk of besetment for vessels.
- 沿岸局とは？ A shore-based VHF or radio station responsible for maritime safety and communication in a designated coastal area.
- 沿岸流警報とは？ Official notice to mariners about significant changes, hazards, or anomalies in coastal water currents affecting safe na...
海
- 海水冷却ポンプとは？ A pump supplying seawater to coolers for cooling main and auxiliary machinery, essential for temperature regulation and ...
- 海氷集中度とは？ A measure (usually in tenths) of the area of a sea region covered by ice, provided in ice bulletins to support safe navi...
- 海況報告とは？ Periodic description of significant wave height, period and swell state transmitted for routing and safety assessments.
- 海洋ごみ報告とは？ A report made to authorities or VTS regarding observed floating or drifting marine debris that may pose a hazard to navi...
- 海洋熱含有量とは？ Measure of thermal energy stored in the upper ocean layers, used to assess cyclone potential and climate trends.
- 海洋観測データ報告とは？ A formal report or transmission containing oceanographic data such as temperature, salinity, current, and sea state, as ...
- 海霧警報とは？ Notice that horizontal visibility at sea will fall below one kilometre due to advection or radiation fog.
- 海面水温とは？ Measured or satellite-derived temperature of ocean top centimetre, critical for routing, icing and cyclogenesis forecast...
浸
- 浸水制御とは？ Procedures and systems used to limit, contain, and remove water ingress after hull damage or compartment flooding.
- 浸水制御とは？ Actions and onboard systems used to limit, isolate, or remove flooding in compartments, such as watertight doors, pumps,...
- 浸水区画とは？ A watertight section of a vessel that has unintentionally filled with seawater due to hull breach or system failure.
- 浸水訓練とは？ A mandatory exercise in which crew practice responding to flooding, including detection, boundary establishment, and use...
- 浸水警報とは？ An audible and/or visual alarm triggered automatically or manually when water ingress is detected in compartments below ...
消
- 消火ブランケットとは？ A fire-resistant sheet used to smother small fires or protect personnel during escape, required in galley and accommodat...
- 消火ポンプとは？ A fixed or portable pump designed to supply water to firefighting systems throughout the vessel, essential for controlli...
- 消火ロッカーとは？ A designated compartment or cabinet onboard containing firefighting equipment such as hoses, nozzles, and personal prote...
- 消火主管とは？ A fixed piping system on a ship delivering water under pressure for firefighting throughout the vessel.
- 消火主管とは？ The principal pipeline on board supplying seawater under pressure to hydrants and hoses for firefighting, as specified b...
- 消火制御ステーションとは？ A designated area on board equipped with firefighting equipment and control panels for managing emergency fire situation...
- 消火毛布とは？ A sheet made of fire-resistant material used to smother small fires by cutting off the oxygen supply, often located in g...
- 消火班とは？ A designated team trained and assigned to respond to onboard fires and operate firefighting equipment as per muster list...
- 消火班とは？ A team of designated crew members trained and equipped to respond immediately to fire alarms, undertake firefighting, an...
- 消火班とは？ A designated team of trained crew members equipped to respond immediately to fire alarms, conduct firefighting, and perf...
- 消火管理図とは？ A mandatory shipboard document showing fire safety systems, detection, protection, and escape routes as required by SOLA...
- 消火訓練とは？ A mandatory exercise where crew practice procedures for responding to fire emergencies, including alarms, mustering, and...
- 消火配備図とは？ A detailed, IMO-mandated shipboard diagram showing locations and procedures for firefighting equipment, escape routes, a...
- 消防ポンプとは？ A dedicated pump used to supply seawater to fire hydrants and hoses on board for firefighting operations.
清
温
- 温室効果ガスインベントリとは？ Comprehensive report of CO₂, CH₄ and N₂O emissions from vessel operations for regulatory compliance and environmental ma...
- 温度記録とは？ The continuous recording of temperature measurements within cargo tanks or lines to ensure safe transport and quality co...
- 温暖前線接近とは？ Indication that a warm air mass front is advancing toward the vessel’s area, typically bringing steady rain and veering ...
港
- 港内交通とは？ Collective term for the movement of vessels and craft within port limits as monitored by VTS or Harbour Master.
- 港内速度制限とは？ The officially published maximum speed permitted for vessels within a designated harbour or port area, set by local auth...
- 港湾水先人下船とは？ The controlled process by which the harbour pilot safely leaves the vessel after completing the inbound or outbound pass...
- 港湾水先人乗船とは？ The procedure for safely boarding the harbour pilot at sea or at the entrance of the port using a pilot ladder or launch...
潮
- 潮汐ウィンドウ計算とは？ The process of determining the optimal period based on tidal height during which a vessel can safely transit shallow wat...
- 潮流方向とドリフトとは？ The direction (set) and speed (drift) of water current affecting the ship’s course and position.
- 潮流更新とは？ New information on rate and set of tidal current issued by VTS or hydrographic authority for local area.
火
- 火災を報告とは？ A prompt or instruction to immediately communicate the occurrence, location, and extent of a fire on board or ashore, us...
- 火災警報とは？ An audible and/or visual signal, automatically or manually triggered, alerting crew to the presence of fire and the need...
- 火災警報とは？ An audible and/or visual signal system activated manually or automatically to warn crew of fire and trigger the ship’s e...
熱
燃
- 燃料フィルターバイパスとは？ A mechanism allowing fuel to flow around a clogged filter element to maintain engine operation in emergencies, potential...
- 燃料ラック位置とは？ The precise setting of the fuel control rack that determines the amount of fuel delivered to each cylinder of a diesel e...
- 燃料切替手順とは？ A documented process for safely switching the ship’s fuel supply from one grade or type to another, often to comply with...
- 燃料油ホモジナイザーとは？ A machine that breaks down asphaltene clusters and ensures uniform mixing of fuel oil, improving combustion quality and ...
- 燃料油粘度とは？ The measure of a fuel oil’s resistance to flow, critical for engine injection and atomization; monitored and regulated i...
- 燃料移送とは？ The process of pumping fuel oil from one tank to another or to the engine, requiring strict adherence to MARPOL, safety,...
爆
現
発
着
- 着岸速度制限とは？ Maximum allowable approach speed normal to berth to prevent fender overload and structural damage.
- 着氷警報とは？ Notice that superstructure icing rate exceeds 2 cm h⁻¹ due to freezing precipitation or spray, requiring anti-icing meas...
- 着氷霧警報とは？ An advisory issued to warn vessels of freezing fog conditions, which may cause ice accumulation on decks, equipment, and...
磁
粘
緊
- 緊急けん引とは？ The act of towing a vessel in distress or unable to maneuver using an emergency tow line or arrangement as per SOLAS req...
- 緊急シャットダウンとは？ Immediate cessation of cargo or bunker transfer operations, activated by crew or terminal, to prevent accidents or mitig...
- 緊急位置とは？ Location reported by a vessel or person in distress, usually in latitude and longitude for rescue coordination.
- 緊急位置ビーコンとは？ A radio beacon, such as an EPIRB, used to transmit the position of a vessel or survivor in distress to search and rescue...
- 緊急停止とは？ An immediate shutdown of machinery or vessel propulsion, triggered by an emergency to prevent further damage or danger.
- 緊急停止とは？ Immediate cessation of shipboard machinery, system, or cargo operation due to a critical safety or environmental risk.
- 緊急停止距離とは？ Measured distance travelled from full ahead to complete stop using maximum astern power and rudder amidships.
- 緊急制御ステーションとは？ A designated area from which emergency operations such as firefighting, ventilation control, and communication are coord...
- 緊急報告とは？ The formal communication and documentation of an emergency situation to the bridge, VTS, or authorities, following stand...
- 緊急対応とは？ Immediate actions taken by trained crew to mitigate emergencies such as fire, flooding, collision, or medical incidents,...
- 緊急手順とは？ A set of predefined actions and communications for crew to follow in response to emergencies such as fire, collision, gr...
- 緊急時訓練とは？ Structured instruction and practice provided to crew members to ensure preparedness for handling emergencies such as fir...
- 緊急曳航ペナントとは？ A strong wire or rope rigged at bow or stern, readily accessible for emergency towing if the vessel becomes disabled.
- 緊急燃料遮断とは？ A safety device or procedure for rapidly stopping fuel supply to machinery or tanks in case of fire or other emergencies...
- 緊急現場とは？ The specific onboard location where an emergency incident—such as fire, flooding, or injury—has occurred and emergency r...
- 緊急用洗眼器とは？ A safety device providing immediate water flow for flushing eyes exposed to chemicals, smoke, or contaminants on board.
- 緊急用給水とは？ Stored or alternate source of potable water kept on board for survival use in emergencies or after system failure.
- 緊急用酸素供給とは？ Portable or fixed supply of medical oxygen available for emergency use by crew or passengers in case of fire, smoke or m...
- 緊急送信機とは？ A dedicated radio device used to send automatic distress signals, such as EPIRBs or DSC-enabled VHF/MF/HF transmitters.
- 緊急通信とは？ Radio messages of high urgency concerning the safety of a ship, person, or environment, requiring priority over all othe...
- 緊急降下とは？ A rapid controlled descent initiated due to onboard emergencies such as fire or loss of cabin pressure, as per SOLAS and...
- 緊急集合とは？ The immediate assembly of all crew and passengers at assigned muster stations in response to an alarm or emergency situa...
聴
脱
- 脱出シュートとは？ An emergency evacuation device, usually an inflatable or fabric tube, enabling rapid escape from high decks to safe area...
- 脱出スライドとは？ An inflatable slide fitted to the ship’s side, designed for rapid evacuation of crew and passengers directly into the se...
- 脱出スライドとは？ An inflatable slide or chute deployed to allow rapid evacuation of personnel from ship to liferaft or pier during emerge...
- 脱出口ハッチとは？ A designated exit, usually watertight, providing a safe escape route from enclosed spaces in an emergency.
- 脱気タンク水位とは？ The measured height of water within the deaerator tank, critical for ensuring proper removal of dissolved gases from boi...
自
- 自動ボイラー薬注とは？ A system that automatically injects water treatment chemicals into the boiler feedwater to control scale and corrosion, ...
- 自動レーダープロットとは？ The process by which radar targets are tracked and collision risk assessed automatically by ARPA systems, displaying rea...
- 自動解放装置とは？ A device designed to automatically release life-saving appliances, such as liferafts, when submerged or activated by spe...
- 自動逆洗とは？ A system that automatically reverses flow through filters or strainers to remove debris and maintain performance without...
- 自動電力管理とは？ A computerized system on board ships that monitors and optimizes power generation and distribution automatically, ensuri...
航
- 航行を再開してくださいとは？ Order authorising a vessel to continue its original voyage after a temporary stop, alteration, or holding pattern.
- 航行警告とは？ A formal broadcast or message informing mariners of navigational hazards, new obstructions, or significant changes in ch...
- 航行警報とは？ Official broadcast of hazards, obstructions, or operational restrictions that may affect safe navigation.
- 航路分離方式とは？ An internationally recognized routing measure that separates opposing streams of vessel traffic by defined lanes and rul...
- 航路横断流とは？ Lateral water flow across a dredged channel causing set and drift that must be compensated during navigation.
- 航路設計水深とは？ The minimum depth of a navigational channel as determined and maintained by authorities for safe passage of vessels, ref...
舵
- 舵シンクロアラームとは？ An alert indicating a mismatch between helm (steering wheel) position and rudder angle, requiring immediate attention to...
- 舵切り開始点とは？ The charted position at which the rudder is first applied to initiate a planned course alteration so that the vessel fol...
- 舵切り開始線とは？ A track line shown on chart or radar which, when crossed, indicates the precise moment to start the wheel-over so that t...
- 舵効失損とは？ Reduction in steering response due to low water flow over rudder, cavitation, or mechanical limitation.
- 舵命令確認とは？ The required verbal response by the helmsman to confirm receipt and understanding of a helm order from the officer of th...
- 舵操作権移管手順とは？ The standardised method for transferring control of the ship’s steering from one helm station or operator to another, en...
- 舵装置警報とは？ A warning signal indicating malfunction or abnormal condition in the steering gear system, requiring immediate crew inve...
- 舵角リミッターとは？ Device or setting restricting maximum rudder angle to prevent over-steer at speed or protect steering gear.
船
- 船団に参加とは？ Instruction or request for a vessel to assemble and proceed as part of an organized convoy for mutual safety, security, ...
- 船尾管シールとは？ A sealing device at the exit point of the ship’s propeller shaft through the hull, preventing water ingress and oil leak...
- 船舶気象観測とは？ Recorded meteorological observations from ships, submitted to authorities or meteorological agencies for forecasting and...
補
訓
警
- 警報取消とは？ Official notification that a previously issued warning is no longer in effect.
- 警報放送とは？ A formal message disseminated by VTS, harbour authority, or vessels to alert all ships in an area about navigational haz...
- 警報解除とは？ Formal message to withdraw or annul a previously issued navigational, meteorological, or safety warning that is no longe...
負
- 負傷者集合とは？ The assembly and accounting of crew and passengers following an incident to identify and assist injured or missing perso...
- 負荷連動始動とは？ An automatic function of the ship’s power management system that starts or stops auxiliary engines or generators based o...
- 負荷遮断システムとは？ An automated system that disconnects non-essential electrical loads to prevent total blackout when generator capacity is...
追
- 追い越す意図ありとは？ Announcement that a vessel plans to pass another vessel ahead on a specified side in accordance with the COLREGS.
- 追従船舶とは？ A vessel which is navigating behind another in the same direction, often in a convoy or traffic lane.
- 追越禁止区域とは？ A defined sector of a channel or waterway where overtaking by vessels is prohibited for safety reasons, often due to res...
退
逆
進
- 進出・横移り表とは？ A manoeuvring aid providing predicted advance (distance along original track) and transfer (lateral distance) for specif...
- 進路を確認してくださいとは？ A request or instruction to verify and state the vessel’s current or intended navigational course, usually in degrees tr...
- 進路変更なしとは？ Statement indicating that the vessel’s heading remains as previously instructed or reported.
- 進路変更ポイントとは？ A precisely charted position where a ship is required to change its course, usually as part of a passage plan.
遠
遭
- 遭難中継とは？ The retransmission of a received distress call or message by a station not in distress, alerting other ships or coast st...
- 遭難信号とは？ A recognized sound, light, radio, or visual signal sent by a vessel or person indicating imminent danger and urgent need...
- 遭難信号とは？ A signal indicating a vessel or person is in grave and imminent danger and requires immediate assistance. Includes visua...
- 遭難信号受信とは？ Formal confirmation of receipt of a distress message, typically using prescribed wording as per SMCP and ITU RR.
- 遭難優先とは？ The highest level of urgency assigned to radio or communication messages involving imminent danger and the need for imme...
- 遭難周波数とは？ A radio frequency internationally allocated for maritime distress, safety, and calling, such as VHF channel 16 (156.8 MH...
- 遭難解除とは？ Official transmission that a previous distress message is no longer valid, usually after the situation has been resolved...
- 遭難警報とは？ An internationally recognized signal, transmitted by GMDSS or VHF, indicating grave and imminent danger requiring immedi...
- 遭難通信とは？ Transmission of information regarding a distress situation, including distress calls, messages, and subsequent coordinat...
- 遭難通信とは？ Radio transmission used to indicate that a vessel or person is in grave and imminent danger requiring immediate assistan...
- 遭難通信とは？ Radio transmissions exclusively concerning vessels or persons in grave and imminent danger, given absolute priority on a...
避
針
閉
防
- 防汚塗料検査とは？ Port state or class survey checking hull coating compliance with IMO AFS Convention and assessing biological growth.
- 防火区画とは？ A designated compartment or section of a vessel, defined by structural boundaries, to limit fire spread and facilitate f...
- 防火区画とは？ A designated section of a ship separated by fire-resistant boundaries to contain and limit fire spread, as defined by SO...
- 防火扉とは？ A specially constructed door designed to resist fire and prevent the spread of flames and smoke between compartments or ...
障
雷
電
- 電動機過負荷とは？ A condition in which an electric motor draws current above its rated limit, risking overheating and possible failure unl...
- 電子ドッキング支援装置とは？ Shore-based microwave or laser sensor system providing real-time range, closing speed, and alignment data to approaching...
- 電子ベアリングラインとは？ A digital navigational tool on ECDIS or radar for plotting and monitoring bearings to fixed or moving targets, improving...
- 電子レンジラインとは？ A digital tool on radar/ECDIS allowing navigators to set and measure a precise distance from own ship to a selected poin...
静
非
- 非常停止スイッチとは？ A manually operated control that immediately halts machinery or electrical equipment in emergencies to prevent damage, f...
- 非常口とは？ A clearly marked route or door for rapid escape from a compartment or area during emergencies.
- 非常操舵位置とは？ A designated location, often aft, equipped for manual control of the ship’s rudder if the main steering gear or control ...
- 非常操舵装置とは？ Alternate manual or powered system used to control ship's rudder if the main steering fails.
- 非常照明とは？ Battery-backed or independent lighting automatically activated during main power failure for safe evacuation and emergen...
- 非常用ビルジポンプとは？ A portable or dedicated pump used to remove water from the bilge in case of flooding or main pump failure.
- 非常用ビルジ吸引とは？ A designated suction line and valve in the engine room bilge system used only in emergencies to rapidly remove water fro...
- 非常用発電機とは？ A dedicated generator that supplies electrical power to essential systems during main power failure, as required by SOLA...
- 非常用発電機パネルとは？ The control interface for the ship's emergency generator, enabling monitoring, activation, and shutdown of emergency ele...
- 非常用発電機始動とは？ The procedure to initiate the ship's emergency generator to supply critical electrical power during a main blackout or f...
- 非常用脱出とは？ A designated route or means for crew to safely evacuate from compartments, accommodation, or machinery spaces during eme...
- 非常用航海灯とは？ A portable or fixed battery-powered navigation light used to maintain minimum required navigation signals in the event o...
- 非常用電源とは？ Alternative power source such as a generator or battery supplying essential systems during main power failure.
- 非常舵操位置とは？ A dedicated station—usually aft in the steering gear room—used to control the ship’s steering in the event of bridge ste...
- 非常警報とは？ The shipwide audible and visual signal indicating a serious emergency; activates muster or evacuation as per muster list...
高
- 高圧燃料とは？ Fuel oil pressurized to high levels for injection into main engine cylinders, delivered by high-pressure pumps as specif...
- 高気圧稜線とは？ An elongated area of high atmospheric pressure, typically associated with calm weather and stable sea conditions.
- 高液位アラームとは？ A critical warning system that alerts crew when the liquid in a tank approaches a designated high point, preventing over...
- 高潮注意情報とは？ Warning that abnormal sea-level rise due to cyclonic surge is expected in coastal area, requiring preventive mooring and...
- 高潮警報とは？ An official alert issued to vessels regarding an abnormally high rise of sea level due to meteorological effects, especi...
- 高電圧とは？ Warning regarding electrical systems or cables carrying dangerous voltage levels, requiring safety precautions.
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