Weaving Back & Forth at Anchor

Agility · 06-11-2009, 07:40

Perhaps a more controversial solution and clearly from my own personal experience. I don't think conventional wisdom would support this theory but math could.

Shorten your scope! My Tayana 58 deck salon would surf like crazy. I would typically use a 3:1 or at times 4:1. My theory was that if the boat was surfing another 10% due to 5:1 scope instead of 4:1 scope then I was more likely to drag because of the increased force on the anchor from the addition speed during the longer and faster arc.

Call me crazy, but I only dragged a couple of times in 18 month of anchoring all around the world and that was in areas where I knew there wasn't good holding. If I could set the anchor at 3:1 with 2,000 RPM's I felt comfortable that it wold reset in a wind shift.

The other observation was that the few time that I drug, it was at the apex of the arc. 33K tonnes at 2-3 knots is a lot of force.

Expectations for my new Atlantic 57 is that she doesn't surf much at all and that more scope actually helps holding dramatically. The the only issue it too much scope for the surrounding boat at anchor, especially those Tayana 57's

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06-11-2009, 07:40	#28
Agility Registered User Join Date: Sep 2006 Location: Boulder, CO Boat: Atlantic 57 - Agility Posts: 165	Perhaps a more controversial solution and clearly from my own personal experience. I don't think conventional wisdom would support this theory but math could. Shorten your scope! My Tayana 58 deck salon would surf like crazy. I would typically use a 3:1 or at times 4:1. My theory was that if the boat was surfing another 10% due to 5:1 scope instead of 4:1 scope then I was more likely to drag because of the increased force on the anchor from the addition speed during the longer and faster arc. Call me crazy, but I only dragged a couple of times in 18 month of anchoring all around the world and that was in areas where I knew there wasn't good holding. If I could set the anchor at 3:1 with 2,000 RPM's I felt comfortable that it wold reset in a wind shift. The other observation was that the few time that I drug, it was at the apex of the arc. 33K tonnes at 2-3 knots is a lot of force. Expectations for my new Atlantic 57 is that she doesn't surf much at all and that more scope actually helps holding dramatically. The the only issue it too much scope for the surrounding boat at anchor, especially those Tayana 57's