"....I have run side by side with a CD-25 head into 4-5 foot waves for about a 3 hour stretch,...."
That was the roughest passage I have made. From Glendale Cove west down Knight Inlet to Gilford Island and Seargents Passage, the first place to really get out of it on the way to Lagoon Cove. It was a wind against current for about 18 miles, and much of the time we were running about 4 knots, rarely 6. I know I said 3 hours, It was probably more like 4 and it felt like 8.
And yes, I agree with Colby, we do have different water here. You have fresh, we have salt. We have swells that start somewhere east of Japan and will have a period, (time between crests of 15 up to 30 or 40 seconds. And then there are waves, waves are generated by wind and do not have such long periods. It is not uncommon to see them in the 5 second bracket and a 10 second wind wave is long. With those waves you do a lot of hobby horsing, power up and back off at the crest to keep from the pounding, then power up and back off. In those waves, (my usual cruising speed is about 5 knots) that would be rushing and pounding, so I might be down to 2.5 or 3 knots water speed. A 5 second wave period isn't much longer than a 22 foot boat. It doesn't take much wind to make wind waves when the tidal current is opposing at 2, 3, 4, 5 or 6 knots and due to bottom configurations, we have varying water speeds so a westerly wind at 10 knots can produce waves of from 1 to 3 feet if the tidal current is running ebb in Juan de Fuca, or for that much, anywhere along the east coast of Vancouver Island or even down into the Salish, though there is much more north/south action there.
I am curious what makes waves in the Great Lakes different? Long fetch, higher winds, shallow bottoms or ??? I know I hear about that often, but other than the salt vs fresh water, I don't see a big difference. The weight of water is still close, The physics rules still apply, so what is it really?
The point is, the C-Dory can take much more than you will want to. To keep it from slapping, or crashing you have to slow down to a speed that will allow the boat to rock over the top of the wave, slide down the next face, maintain control and keep from diving into the next wave.
Harvey
SleepyC :moon
