You desire to make good a true course of 279°. The variation is 8°W, magnetic compass deviation is 3°E, and gyrocompass error is 1°E. A north-northwesterly wind produces 3° leeway. What is the course to steer per standard magnetic compass (psc) to make the true course good?

Question

You desire to make good a true course of 279&deg;. The variation is 8&deg;W, magnetic compass deviation is 3&deg;E, and gyrocompass error is 1&deg;E. A north-northwesterly wind produces 3&deg; leeway. What is the course to steer per standard magnetic compass (psc) to make the true course good?

Accepted Answer

Option C: 287&deg;psc. Leeway from a NNW wind pushes the vessel to the SSE, requiring a 3-degree correction to the right of the desired track. Applying the conversion formula: True Course (279) + Leeway (3) = Course Over Ground. Adjusting for Variation (8W) and Deviation (3E) yields 287 degrees PSC. Gyro error is irrelevant when calculating a magnetic compass course.

You desire to make good a true course of 279&deg;. The variation is 8&deg;W, magnetic compass deviation is 3&deg;E, and gyrocompass error is 1&deg;E. A north-northwesterly wind produces 3&deg; leeway. What is the course to steer per standard magnetic compass (psc) to make the true course good?

You desire to make good a true course of 279°. The variation is 8°W, magnetic compass deviation is 3°E, and gyrocompass error is 1°E. A north-northwesterly wind produces 3° leeway. What is the course to steer per standard magnetic compass (psc) to make the true course good?