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Old 07-29-2017, 04:47 PM   #1
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Swinging at anchor

So I pulled into Marsh Harbor to anchor out today. Wife and one son need to fly back tomorrow. Anchored out with about 8 other boats-- all sail boats.

Why is mine the only one moving all over at anchor? I have a paddle board on the bow. Also have a snubber set but maybe not correctly.
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Old 07-29-2017, 05:08 PM   #2
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Look perfectly still to me. :-)
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Old 07-29-2017, 05:24 PM   #3
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Is it possible that a current is affecting your anchoring spot differently than that of others in the area. It doesn't look like you're anchored in among a crowd.

The paddle-board shifts your above-water profile further forward, but not enough (I don't think) to offset the windage of that aft deckhouse.

Maybe ease out some more scope and see what happens?
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Old 07-29-2017, 05:30 PM   #4
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Can you unroll a bit of main sail to keep it pointed into the wind?
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Old 07-29-2017, 05:38 PM   #5
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I have noticed the same thing when I anchor next to a sailboat.

I think that t comes down to the fact that they probably have a gigantic keel coupled with lower windage.
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Old 07-29-2017, 05:39 PM   #6
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Quote:
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Can you unroll a bit of main sail to keep it pointed into the wind?
Judging from the profile drawing in Cardude's avatar, it appears that a bit of main would still lie at or forward of the boat's aerodynamic center of effort. Ketches and yawls have this easier - a bit of mizzen settles things right down.
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Old 07-29-2017, 05:50 PM   #7
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Can you unroll a bit of main sail to keep it pointed into the wind?
I was wondering about doing that. Would probably flap like hell however.
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Old 07-29-2017, 05:53 PM   #8
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I have noticed the same thing when I anchor next to a sailboat.

I think that t comes down to the fact that they probably have a gigantic keel coupled with lower windage.
This is probably the case. I do have more windage and I'm sure less keel than these other boats.

I probably need to let out more scope as well.

I suck at anchoring.
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Old 07-29-2017, 06:36 PM   #9
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If your anchor line is not in line with the boat centerline, the wind will push it to one side. Do you use a bridle ?
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Old 07-29-2017, 06:48 PM   #10
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I still am not used to how much my boat sails at anchor compared to my sailboat. As others have said, it is a combination of greater windage and less keep and rudder. A sailboat has a much larger keel and most will have a fin keel and spade rudder. These are going much deeper in the water limiting movement.

More scope may help, but I doubt it. I am sitting at anchor myself right now and am swinging back and forth much more than the sailboats around me.
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Old 07-29-2017, 07:05 PM   #11
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I think that t comes down to the fact that they probably have a gigantic keel coupled with lower windage.
Indeed the size of their keel make them far less prone to swing under wind. They roll more but swing less.
One owner of my marina has a sailboat transformed in trawler (removed the mast and use it has a trawler), his gigantic keel allow him to go straight, and even in reverse, under moderate wind.

L.
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Old 07-29-2017, 07:12 PM   #12
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Swinging at Anchor

Sydney has mooring areas catering for sailboats and powerboats, it is recognized that sailboats and powerboats swing differently, space has to be allowed for that to happen to avoid collisions.
At first I was thinking you were inviting over guests from the sailboats to enhance the swinging....
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Old 07-29-2017, 07:18 PM   #13
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We used to have a Catalina 42 sailboat. It would sail at anchor so much that sometimes I thought it had decided to sail out of the anchorage.
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Old 07-29-2017, 08:06 PM   #14
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I wonder if your rudder hard over to one side or the other make a difference ?
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Old 07-29-2017, 08:07 PM   #15
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Ours dances a bunch at anchor . My old islander sailboat always pointed to wind , hardly moved at all . Cardude I guess you know you've cause me to start thinking about a salty sailboats again.
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Old 07-29-2017, 08:22 PM   #16
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I wonder if your rudder hard over to one side or the other make a difference ?
I just realized I didn't lock my rudder.

Also, my snubber is just a single line off to one side of the chain and not set up as a bridle. Maybe that makes it worse.

Anchoring is hard....
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Old 07-29-2017, 08:29 PM   #17
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I think having the attachment point of your anchor along the centerline of the boat will help to minimize swinging.
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Old 07-29-2017, 08:33 PM   #18
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Make a checklist while it's fresh in your head. It'll help the next few times until it becomes second nature.
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Old 07-29-2017, 08:45 PM   #19
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Quote:
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Ours dances a bunch at anchor . My old islander sailboat always pointed to wind , hardly moved at all . Cardude I guess you know you've cause me to start thinking about a salty sailboats again.
I'm having so much fun trying to learn how to be a sailor.

But the power boater still comes out. I beat a regular sailboat into this anchorage today-- he had a small engine I guess. ��
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Old 07-29-2017, 08:47 PM   #20
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I think having the attachment point of your anchor along the centerline of the boat will help to minimize swinging.
OK. I guess I need to rig up a real bridle.
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