You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T? DEVIATION TABLE Magnetic Heading Deviation 285° 5°E 270° 3°E 255° 1°E 240° 1°W

Question

You wish to make good a course of 258&deg;T, allowing 4&deg; leeway for northerly winds. The variation is 21&deg;W. What should you steer per standard magnetic compass to make good 258&deg;T? DEVIATION TABLE Magnetic Heading Deviation 285&deg; 5&deg;E 270&deg; 3&deg;E 255&deg; 1&deg;E 240&deg; 1&deg;W

Accepted Answer

Option C: 278&deg;psc. Working backward from 258°T: add 21° West variation to obtain magnetic 279°. A northerly wind produces 4° leeway to south, so steer 4° into the wind to true 275°. Entering deviation table near 275° yields approximately 3°E deviation, resulting in 278°psc.