I'm confused,.... i agree with BPF it should be 264?Mag heading 170 + 90 for the right angle + 4 for the drift.if it means you are Due West then its 274?? (which is not a right angle) in NZ we have a mg deviation.... 'east is least' is this why i'm 10 deg out from the answer.... could somebody do this S.L.O.W.L.Y.we didn't have to do alot of radio nav for our PPL's :-)