Join Date: Nov 2009
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DIY Sea Anchor
I have made my own for my yacht (16.48m LOA/14.9T GW/2.7m draft).
First, I did a lot of research (thanks to Google, etc.).
After that, armed with the data from the downloads, I calculated (interpolated) the size I needed. I eventually settled with a 24ft (7.1m) 24-gore ex-military reserve parachute, complete with shrouds and harness.
I fabricated a 200mm ring with 2 rings joining at an apex to form quandrants on the 200mm ring. I then cut the shrouds from the harness attach points and then attached the shrouds (clove hitch and 1/2 turn) #1-6, 7-12, 13-18, 19-24 onto each of the quadrants. A swivel shackle was then attached to the deployment ring, and then 150m quad-braid nylon rope (16mm) was used as an anchor rode.
A recovery bouy is attached to the parachute apex on a 50m 8mm floating line.
So far it has deployed perfectly; recovery has been without any problems.
The supreme test is yet to occur, but I see no reason why it will not work under storm conditions.
Cost - USD75, not including the anchor rode. The deployment ring was a special order and cost about USD80.
I also have a drogue 'chute (2.1m) for use when running in heavy seas - that is another story.