For a C-Dory, going through Deception Pass, there is plenty of room to maneuver BUT (there is always one of those right?) You have to stay awake, stay on top (pun intended) of your game, and not dilly dally in your process.
And that process is the same no matter what rapids, pass or high current area you happen to be traversing. Yes there can be BIG whirlpools, those big round swirly things that look like they could eat you, your boat and more for an appetizer. Be advised, they can, BUT, you can navigate through them although there is plenty of room for some good caution. A friend of mine, an RCMP officer on marine patrol transiting Seymour Narrows near Campbell River BC saw a mid 20 foot FG boat in front of his patrol boat taken out by a log about the size of a telephone pole that came straight up from underwater and launched right through the boat hull just behind the helm seat. That log had been sucked down in one of those whirlpools.
So the best time to navigate the rapids is when those whirlpools are least present -- slack tide.
The next best option, to get through safely is to run them, fast. stay up on plane and keep a good eye ahead for anything in the water, and especially for the whirlpools. You want to take the whirlpools on the side that is turning away from you, or going in the same direction as you are. Keep your speed up and yes, it will not be a straight line. You have to weave side to side to stay on the correct side of the whirlpools, and keep your speed up. I would also try to stay 1-2 boat lengths out from the vortex. (I have never seen any info on where the safest place to be is but that is what one of the BC water taxi guys told me, (he transits Seymour regularly).
Along the way there will be overfalls, or steps, and sometimes they can be as much as a foot or more. That is not something you want to run smack into head on. I have come off some of those steps, but never been where I had to climb onto anything more than maybe 6 or 8 inches. Either up or down, you want to be perpendicular to that shelf.
I should think that it goes without saying that everyone on board is wearing a PFD, NOBODY on the bow or in the cockpit, and everyone sitting, with a hand grip place.
And Just for kicks, there are some tour boats that go through there regularly if you want a closer look.
Harvey
SleepyC :moon
