Celestial Navigation · Time — Zone Description East
Your DR longitude is 52°E. What is the zone description?
- A+3 (wrong sign for east)
- B−3 (subtract 3 hours from ZT)✓ Correct
- C−4 (one zone too many)
- D−52 (that is the longitude, not a ZD)
Explanation
52 ÷ 15 = 3.47, rounded to 3. East longitude is negative: ZD = −3 (subtract 3 hours from zone time for GMT).
Authority: Bowditch (Pub. No. 9), Time
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