Discussion
Arrange these steps of aligning a directional gyro in flight:
1. Establish steady level unaccelerated flight
2. Allow the magnetic compass to settle
3. Read the magnetic heading from the compass
4. Set the directional gyro to that heading
5. Repeat at intervals to counter accumulated drift
Select the correct sequence.
Answer: A
Correct answer: 1, 2, 3, 4, 5
The order follows from the compass's limitations. Steady level unaccelerated flight comes first, because the magnetic compass suffers turning and acceleration errors and is trustworthy in no other condition.
The compass is then allowed to settle, since it oscillates after any disturbance. Only then is the heading read and the gyro set to it. The repetition at intervals - conventionally about fifteen minutes - is what keeps accumulated drift within a degree or two.
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