To add to the previous replies, I have a mid-boom preventer (think it came with the boat, it's old) that has two "clamp" devices that each fit around one side of the boom and have a lip that reaches down into the bolt rope slot on top of the boom.  They both are shackled to a 4:1 tackle that at the bottom which has a snap shackle to the toe rail.  Here on Long Island Sound I mostly use it to pull against the mainsheet and thus lock the boom in place as I bounce in the motorboat slop....

Neil Gallagher
Weatherly 35-1
Glen Cove, NY

On 3/16/2019 11:44 AM, David Knecht via CnC-List wrote:
I have been thinking aobut rigging a preventer on my boat so re-read this old discussion of how people rig them. End boom attachment sounds preferable, but does that have to run outside the shrouds?  If so, then you would have to rig it before letting the main out while you can stlill get to the end of the boom.  Then, how do you gybe when you want to?

  I have a single reef point on my new main, so I have an extra internal boom line and sheave  from the second reef setup that exits at the rear of the boom.  I am thinking that if i put a long enough line with a snap shackle at the end where it exits the boom, I could use that as a preventer.  Before letting the main out downwind, you would grab the shackle and run it forward to the toe rail near the bow and clip it in and then have control from the stopper on the cabin top.   Thoughts?  Dave PS- No expectation of offshore/big waves racing in my future so this is a cruising/club racing solution



S/V Aries
1990 C&C 34+
New London, CT




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