What does a gyrocompass measure?

• A. Pitch
• B. Velocity
• C. Heading
• D. Roll

Answer: (C)

A gyrocompass is a type of navigational device that determines the heading or orientation of a vessel in relation to true north. Unlike a magnetic compass, which can be influenced by magnetic fields and surrounding ferrous materials, the gyrocompass uses the principles of gyroscopic motion and Earth's rotation to maintain its alignment with true north regardless of geographic location. This provides a reliable means of navigation, particularly in situations where magnetic compasses may be ineffective.

By measuring heading, a gyrocompass enables mariners to accurately maintain their course and make informed navigational decisions. It is particularly valuable in modern maritime operations, where precision is crucial for safe navigation.