Oh dear, we are at the arrogant and self righteous stage of quoting definitions and insults. Sorry BD, I note your sequence of events but prefer John Day's. Why didn't they turn at waypoint A, because they couldn't see it. The most reliable witnesses as to the weather and vis at the time, those at the lighthouse and on the Mull you choose to ignore quoting only the yachtsman who was at sea level beneath the layer and in any case changed his story at subsequent recollections..