well, there's always sponsons ...

but in this case I'd suggest a kayak catamaran. join the kayaks with light
cross beams and install nets fore and aft. You'll have a much more stable
dive platform which can carry quite a load. make it wide enough so you can
paddle and then learn to stagger your strokes to they don't interfere. the
space between the hulls on catamarans is important. it has to be wide
enought so the hull waves don't interfere and slow the boat down. the
distance between centrelines of the hulls has to be at least half the
length of the hull (to be precise that's the length of the waterline rather
than the entire hull)


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