At 2234 ZT on 14 July you are in DR position LAT 34°03'N, LONG 150°16'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1°pgc. The variation is 14°E. What is the gyro error?

Question

At 2234 ZT on 14 July you are in DR position LAT 34&deg;03'N, LONG 150&deg;16'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1&deg;pgc. The variation is 14&deg;E. What is the gyro error?

Accepted Answer

Option C: 1.5&deg;W. Obtain Saturn's declination from the Nautical Almanac for the given time. Compute true bearing via amplitude calculation and compare against the gyro bearing, applying local variation parameters to establish the precise gyro error.

At 2234 ZT on 14 July you are in DR position LAT 34&deg;03'N, LONG 150&deg;16'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1&deg;pgc. The variation is 14&deg;E. What is the gyro error?

At 2234 ZT on 14 July you are in DR position LAT 34°03'N, LONG 150°16'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1°pgc. The variation is 14°E. What is the gyro error?