What's the best way to limit mast rotation on a boomless cat. I have a N570 with an NACRA Inter 18 CF mast. At least, to the best of my knowledge that's what it is, it's 30' 4'' tall from halyard sheave to base. No Anti rotation control arm installed.

Can I buy something likeTHIS, and fabricate something?

I can think of a few ideas with the control arm above. With two linens running to the front beam, to two cam cleats mounted on port and starboard side of the mast. With the control arm either facing front or back. I don't like the back idea since it would be close to the tramp and in the way. I also am not sure about it only having one mounting/rivet hole on each side, which would allow the control at to move up and down after installation on the mast.

Any good ideas? I'm sure someone already figured out a good solution.


NACRA 570 #90308
Hobie 16 #68973