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What is Magnetic Compass Variation?

Magnetic Compass Variation The angular difference between true north and magnetic north, affecting compass readings on board ships.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Magnetic Compass Variation” Used in Practice?

Report magnetic compass variation and deviation for current position before entering pilotage waters as per VTS instructions.

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

Related Maritime English Terms

Gyro Compass ErrorMagnetic InterferenceBridge Navigational WatchGlobal Navigation System

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Frequently Asked Questions

What is Magnetic Compass Variation?

The angular difference between true north and magnetic north, affecting compass readings on board ships.

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