A very entertaining and dexterous encounter. If you are a bold captain and the wind favours you there are several choice open to you to escape the trap. If not your ship usually loses this one. In your case your captain took his chanced to very good effect.
i have wondered about adding Dobbs' tidal rules to this one to test the captains even more, but decided that the game is taxing enough without even more complications.
Congratulations on your escape.

Rob.