The maps in the fishing guide pretty clearly point out the ferry terminal as being above or at the boundry of 10 and 11. In fact the exact description is a line east-west from the north tip of Vashon. On my boat charts, that is at or actually south of the terminal by a few yards. Close enough for government work. North of the terminal would be closed to all fishing, but I did see a few boats working that area when I was out last week.