In a close game, I have a relatively unscathed SOL
that is boxed in by destroyed enemy vessels (frigates)directly below and by the wind blowing against the only other escape route.

Initially, my SOL was in three hexes from the end of the line of destroyed frigates. As turns passed there was only one more hex for the frigates to drift before my SOL could escape.

However, for AT LEAST a dozen turns my SOL has been drifting at the same rate as the frigates.It was my understanding that frigates drift every turn and SOL drift every other turn. This is not happening.

What is it I am not getting?