Entering a harbor, you take a bearing on a range and get 338° per gyrocompass (pgc). The true bearing from the chart is 340°T. Variation for the area is 14°E. Your course is 329° per standard magnetic compass (psc) and 338°pgc. The deviation on this heading is __________.

Question

Entering a harbor, you take a bearing on a range and get 338&deg; per gyrocompass (pgc). The true bearing from the chart is 340&deg;T. Variation for the area is 14&deg;E. Your course is 329&deg; per standard magnetic compass (psc) and 338&deg;pgc. The deviation on this heading is __________.

Accepted Answer

Option B: 3&deg;W. Compass error is the difference between true and compass bearings. With a true bearing of 340° and a gyro bearing of 338°, the gyro error is 2°E. Given the variation is 14°E and the course is 329°psc, calculating the deviation yields 3°W, satisfying the formula: Compass Error = Variation + Deviation.

Entering a harbor, you take a bearing on a range and get 338&deg; per gyrocompass (pgc). The true bearing from the chart is 340&deg;T. Variation for the area is 14&deg;E. Your course is 329&deg; per standard magnetic compass (psc) and 338&deg;pgc. The deviation on this heading is __________.

Entering a harbor, you take a bearing on a range and get 338° per gyrocompass (pgc). The true bearing from the chart is 340°T. Variation for the area is 14°E. Your course is 329° per standard magnetic compass (psc) and 338°pgc. The deviation on this heading is __________.