The Offshore Voyaging Reference Site

Preventer Video

We just published the first of a two-part article on building a safe boom preventer, and, by coincidence, John Kretschmer also published a video showing his preventer in action, including what happens when caught aback.

John designed and specified his preventer using the work done by Kurt Zinsmeyer, the author of the AAC article.

Well worth a look.

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Steve Bonnyman

John
Thanks for posting the video and sharing all of the solid analysis on preventers. We are just “redesigning” the preventer system on our OVNI 495 based on improved load calculations, but the question not well answered (or i have missed it) is what is the best attachment mechanism between the boom line and the rest of the preventer ? Based on strength requirements: (1) a knot seems like a bad idea:(2) , a snap shackle would need to be huge; soft shackles (which we are presently using) are cumbersome to attach/remove with cold wet hands.
Any thoughts and observations ?

Steve