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The distance along the 60°N parallel between 010°W and 020°E is:

A

1200 NM

B

1800 NM

C

450 NM

D

900 NM

Correct

Explanation

Departure = d.long × cos(lat) = (10+20) × 60 × cos(60°) = 30 × 60 × 0.5 = 900 NM.

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