Ship's Deviation and Compass Knowledge

What causes deviation in a ship's magnetic compass?

• Earth's magnetic variation

• Local magnetic influences on the vessel

• Misalignment with the equator

• Solar flares

Deviation is different from variation because:

• Deviation changes with the ship's heading, whereas variation depends on geographic location

• Deviation is constant, while variation changes with heading

• Both deviation and variation are constant

• Deviation is unrelated to the Earth's magnetic field

A deviation table is:

• A record of the ship's journey

• A list of deviations for specific headings

• A map showing Earth's magnetic field

• A compass maintenance guide

The angular difference between True North and Magnetic North is:

• Deviation

• Variation

• Compass error

• Heading error

The sum of variation and deviation results in:

• Compass error

• True heading

• Magnetic heading

• Gyro error

When calculating compass errors: 'Compass Least, Error East' means the error is:

What is the purpose of a deviation curve?

• To reduce compass errors

• To record the ship's movement

• To visually represent deviation values

• To calibrate gyrocompasses

True Virgins Make Dull Company at Weddings refers to:

• Compass calibration steps

• Steps to convert from True to Compass readings

• Navigational course plotting rules

• None of the above

Gyrocompass errors occur due to:

• Permanent magnetism

• Deviation only

• Mechanical faults or misalignment

• External magnetic fields

Gyrocompasses are unaffected by:

• Earth's magnetic field

• True North

• Electric malfunctions

• Ship vibrations