 Going to do what? Just give us plenty of room. Ferry takes about 90 seconds to come to a complete stop. If you do attempt to cross the bow of a ferry and hear five short blasts, that's the captain trying to get your attention, warning you to change your course. It's determined that you're in a potential collision with a Washington State ferry, which again has the right of way. A boaters card required, by the way, State of Washington, for anybody operating a boat with an engine.