Maritime English
Maneuvering

What is Motion Reference Unit?

Motion Reference Unit A device that detects and reports a vessel’s six degrees of motion, used to support dynamic positioning and other navigational systems.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Motion Reference Unit” Used in Practice?

Bridge: Verify motion reference unit is calibrated and transmitting accurate roll and pitch data before initiating dynamic positioning.

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

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Frequently Asked Questions

What is Motion Reference Unit?

A device that detects and reports a vessel’s six degrees of motion, used to support dynamic positioning and other navigational systems.

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