Eight Knots
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Eight Knots
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Most tidal currents are the ocean sloshing back and forth. Deception Pass is a different animal: two large bodies of water sitting at different heights, connected by a gap a few hundred feet wide, with the flow driven by the difference in level rather than by the tide arriving directly. That distinction explains the standing waves, the noise, and the fact that the pass runs effectively one-way for most of every six hours with the direction alternating. It also explains why missing slack is a serious problem or no problem at all depending entirely on which way you were heading. Along the way: why the ebb consistently runs harder than the flood in the predictions, why no one can say for certain what causes that, and why the Skagit is not the answer even though it sounds like it ought to be.
Go look at: the pass at maximum ebb rather than slack, and time a log across the channel from the bridge. Then look up the same day's prediction for Rosario Strait and see that they are not in the same league.