You desire to make good a true course of 347°. The variation is 11°E, magnetic compass deviation is 7°W, and gyrocompass error is 4°W. A north by east wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?

Question

You desire to make good a true course of 347&deg;. The variation is 11&deg;E, magnetic compass deviation is 7&deg;W, and gyrocompass error is 4&deg;W. A north by east wind produces a 4&deg; leeway. What is the course to steer per standard magnetic compass to make the true course good?

Accepted Answer

Option A: 347&deg;psc. Applying standard gyro/magnetic conversion (True +/- Var = Mag +/- Dev = Compass), wind leeway is applied to true course before converting to compass. A north-by-east wind blowing vessel to starboard requires offsetting course accordingly.

You desire to make good a true course of 347&deg;. The variation is 11&deg;E, magnetic compass deviation is 7&deg;W, and gyrocompass error is 4&deg;W. A north by east wind produces a 4&deg; leeway. What is the course to steer per standard magnetic compass to make the true course good?

You desire to make good a true course of 347°. The variation is 11°E, magnetic compass deviation is 7°W, and gyrocompass error is 4°W. A north by east wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?