You desire to make good a true course of 174°. The variation is 17°W, magnetic compass deviation is 4°W, and gyrocompass error is 4°E. A west-southwest 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 174&deg;. The variation is 17&deg;W, magnetic compass deviation is 4&deg;W, and gyrocompass error is 4&deg;E. A west-southwest 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: 199&deg;psc. A WSW wind pushes the vessel to the ENE, requiring a 4-degree correction to the left of the desired track. Starting with the True Course (174), subtract 4 degrees for leeway, then apply Variation (17W) and Deviation (4W) using the Can Dead Men Vote Twice At Elections rule to arrive at 199 degrees PSC.

You desire to make good a true course of 174&deg;. The variation is 17&deg;W, magnetic compass deviation is 4&deg;W, and gyrocompass error is 4&deg;E. A west-southwest 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 174°. The variation is 17°W, magnetic compass deviation is 4°W, and gyrocompass error is 4°E. A west-southwest wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?