You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° 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 203&deg;. The variation is 19&deg;E, magnetic compass deviation is 2&deg;W, and gyrocompass error is 1&deg;E. A westerly wind produces a 3&deg; leeway. What is the course to steer per standard magnetic compass to make the true course good?

Accepted Answer

Option B: 189&deg;psc. Working backward from true course 203°: subtract 19° East variation for magnetic 184°, add 2° West deviation for compass 186°. A westerly wind sets the vessel starboard, requiring a correction to port by subtracting 3° leeway, yielding 189°psc.

You desire to make good a true course of 203&deg;. The variation is 19&deg;E, magnetic compass deviation is 2&deg;W, and gyrocompass error is 1&deg;E. A westerly wind produces a 3&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 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good?