What instrument is primarily used to determine a ship's heading?

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Study for the Marine 3/C Test with essential flashcards and multiple-choice questions, offering hints and explanations. Prepare confidently for your exam today!

Multiple Choice

What instrument is primarily used to determine a ship's heading?

Explanation:
Heading is the direction the bow points. The magnetic compass is the primary instrument for determining this on most ships because it gives the immediate angle to magnetic north directly and is simple, reliable, and widely used as the basic reference for steering. The gyro compass provides true heading and is highly accurate, but it relies on power and calibration and is often used as a supplementary reference for converting to true heading. GPS can show track over ground when moving, but it isn’t the standard instrument for reading the ship’s heading itself, and radar is used for bearing observations, not the vessel’s own heading.

Heading is the direction the bow points. The magnetic compass is the primary instrument for determining this on most ships because it gives the immediate angle to magnetic north directly and is simple, reliable, and widely used as the basic reference for steering. The gyro compass provides true heading and is highly accurate, but it relies on power and calibration and is often used as a supplementary reference for converting to true heading. GPS can show track over ground when moving, but it isn’t the standard instrument for reading the ship’s heading itself, and radar is used for bearing observations, not the vessel’s own heading.

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