Originally Posted by stiffwind
The least expensive method would be to rig your own preventer. Either way, it does not appear that the coach top old traveller fixtures would be useful since the boom would be well outside those points when you need the preventer the most - running with the wind. I think you must have anchor points to the deck or rail at, or beyond, the point on the boom where the line will attachs.
I like everything run to the cockpit, so my preventer rig simply includes a detachable block that I clip onto a padeye around midship (on either port or starboard) and line runs from end of boom through the midship block and then back to the cockpit. When the boom is to the opposite side, I simply go forward, detach the block from the padeye and walk the block around the opposite side via the cockpit, snap on the block, and done. This set up would allow you to go forward at least on the side opposite the preventer rig without encountering those lines.
No way that I can figure to avoid lines across the outside decks.
I think you have a good method. Where do you attach the line to the boom? At the end of the boom or somewhere along its mid section? If I could attach at the mid section I think I could get that to work.