General Navigation

Not quite. The correct answer is B.

Correct answer: B

• A. This flies track as heading and applies no drift correction at all, so the wind from the north is left free to push the aircraft south of the intended track.
• B. Correct: drift = 60 x 25 / 150 = 10 degrees, and since the wind from the north pushes the aircraft south of track, the correction turns the nose towards the wind, adding 10 degrees to the track.
• C. This applies the 10 degree correction in the wrong direction, turning further away from the wind instead of into it, which would add to the drift rather than cancel it.
• D. This applies only half the required correction, 5 degrees instead of 10, as if the halving used for conversion angle elsewhere in navigation also applied to a drift calculation, where it does not.

Not quite. The correct answer is A.

Correct answer: A

• A. Correct: 45 degrees of longitude is 3 hours of arc-to-time, and a place east of Greenwich runs ahead of UTC, so UTC is 3 hours behind LMT: 1430 minus 3 hours is 1130.
• B. This adds 3 hours instead of subtracting, treating an easterly longitude as if it were behind UTC rather than ahead of it.
• C. This treats 1 degree of longitude as 1 minute of time instead of 4 minutes, so 45 degrees becomes only 45 minutes rather than the correct 180 minutes.
• D. This applies no correction at all, as though local mean time and UTC were the same everywhere, ignoring longitude entirely.