At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6°psc. The variation is 14°E. What is the deviation?

Question

At 2237 ZT on 14 July you are in DR position LAT 33&deg;57'N, LONG 150&deg;32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6&deg;psc. The variation is 14&deg;E. What is the deviation?

Accepted Answer

Option A: 2.0&deg;W. Calculating Saturn's amplitude via Bowditch sight reduction methods yields the true celestial bearing. Applying the 14°E variation determines the magnetic bearing, which when compared to the 258.6°psc reading results in a compass deviation of 2.0°W.

At 2237 ZT on 14 July you are in DR position LAT 33&deg;57'N, LONG 150&deg;32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6&deg;psc. The variation is 14&deg;E. What is the deviation?

At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6°psc. The variation is 14°E. What is the deviation?