Hi DennisMe,

Since you plan to build your own boat the simple answer is to make a hard surface deck between hulls rather than have any kind of net. If you need to have the fold-up features typical of Corsairs perhaps you can get Ian Farrier to design a hard deck that would work and be approved for the boat of your choice. As Mary Wells can attest, they started out with hard decks on Shark catamarans and have them to this day and they fold for trailering - maybe you should just start out with a Shark!

The Reynolds 33 that I have been racing has a black mesh tramp that you cannot see through but those boats are about $185K now so it might be out of your budget range. Still that material should be readily available for whatever boat you want to use it on.

Alternatively, and "thinking outside the box", perhaps the simplest and cheapest solution is to have her optometrist produce glasses that will not allow her to look down!! Sort of like the blinders that horses wear but on the bottom instead of the sides. Could cause some accidents so have her put them on only after getting on the boat!

Good luck!