Like this?
Colin
That almost looks like diving Colin - not at all like jumping over the wake that I enjoy doing so much.
I had an ED Krak-A-Long a long time ago, and it had an unusual "anhedral" deck shape that turned downwards towards the bows. This unusual shape caused the boat to dive into a wave and used the trapped air inside the boat to keep it boyant and continue to make forward progress whilst under water.
The boat would eventually burst out of the other side of the wave without loosing too much forward progress.
When competing against them when racing off-shore in heavy seas with my Swordsman they gained a lot of time as my boat climbed every wave and got pushed back time after time.
The Krack-A-Longs progress was much better than the Swordsman under these severe conditions, but I wouldn't fancy the chances of that steamer peforming as well!
Stay safe!
Bob.