Question 604Navigation General
70% to passThe spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?
A
By starting the compass with the spin axis in a north/south position
B
The rotation of the Earth (Earth rate) automatically aligns the gyroscope with north, except for speed errors
C
By mechanically or electrically applying forces to precess the gyroscope
D
By taking advantage of the property of gyroscopic inertia
AI Explanation
The correct answer is C) By mechanically or electrically applying forces to precess the gyroscope. A gyroscope's spin axis tends to remain fixed in space, but this alone does not make it "north seeking" for use as a compass. To align the gyroscope with north, forces must be applied to precess or rotate the gyroscope's spin axis until it points to true north. This can be done mechanically, such as with a gimbaled mount, or electrically, by applying current to torque motors that induce precession. The other answer choices are incorrect because they do not fully explain how a gyroscope is made to point north for compass use.
Related Questions
Q@q.QuestionNumber:Isobars on a weather map are useful in predicting _______________.
Q@q.QuestionNumber:You are required to enter a lock on your voyage. Information on the lock regulat...
Q@q.QuestionNumber:One point of a compass is equal to how many degrees?
Q@q.QuestionNumber:Navigational marks used for informational or regulatory purposes are ___________...
Q@q.QuestionNumber:A buoy having red and green horizontal bands would have a light characteristic ...
Ready to test your knowledge?
Take a Navigation General Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App