Originally Posted by jyasaki
Some of the divers on this side have taken to climbing back onto a sit-on-top from the rear of the craft. Drive up onto the stern, and wiggle forward while straddling the thing. Probably easier for them than a straight kayaker, as they have fins on (more push to get clear of the water.)
I've done it without fins, its easier than getting over the side without rolling providing there is nothing behind the seat.
Free surface effect of water in a kayak is quite bad - but is no worse for a sit ON than a sit IN - but you may be less likely to notice the leak. I think the issue with sit ONs is that they seem so simple that anyone can jump on one and use it with no training and no specialist kit. An experienced sea kayaker going solo in the same water would probably have seemed massively over equipped with a VHF, small pump, spare paddle, paddle float etc.
I don't think the issue is sit ON v's sit IN, or even one shape v another - the issue is poor build quality (or ropey modifications) just as with any vessel. When I take the bung out my sit ON it is bone dry inside.