Maritime English
Maneuvering

What is Underkeel Margin Survey?

Underkeel Margin Survey Hydrographic assessment confirming minimum clearance between keel and seabed along planned passage meets safety criteria.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Underkeel Margin Survey” Used in Practice?

Hydrographic Office: Underkeel margin survey completed; minimum clearance on route is one point two metres above required UKC.

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

Related Maritime English Terms

Mooring Tension MonitoringPropeller Guard CheckQuick Stop ManoeuvreApproach Track Verification

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Frequently Asked Questions

What is Underkeel Margin Survey?

Hydrographic assessment confirming minimum clearance between keel and seabed along planned passage meets safety criteria.

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