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12-09-2018, 05:18 PM
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#1
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Member
City: Gold Coast
Vessel Name: ShipShape
Vessel Model: Clipper 30
Join Date: Nov 2018
Posts: 22
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Why does my boat swing so much at anchor?
Hi All
Very much a newbie here and to this form of boating. Seeking some advice on how to reduce the amount of swing when anchored. In most instances we anchor in relatively calm waters but while boats around me appear to move very little, mine swings back and forth. I don't know if its the bimini top on the flybridge or just the style of boat. I read a post somewhere that attaching a sea anchor to the anchor chain just below water level resolves the problem. Well it didn't...lol.
Thanks in advance.
Mike
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12-09-2018, 05:20 PM
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#2
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Guru
City: Kitimat, North Coast BC
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 5,946
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Hi there & welcome aboard!
Search TF or Internet for ‘riding sail’
__________________
"The most interesting path between two points is not a straight line" MurrayM
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12-09-2018, 05:23 PM
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#3
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Guru
City: Inside Passage Summer/Columbia River Winter
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 8,046
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Welcome Mike.
My boat swings too. I only draw 3'6" and I thing this contributes to more swing when compared to full keel boats. You could also run a stern line to shore.
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12-09-2018, 05:30 PM
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#4
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Guru
City: Kitimat, North Coast BC
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 5,946
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Check out this old thread : http://www.trawlerforum.com/forums/s...tml#post658822
Our boat has a boom, so a small tarp/sail at the end serves the same function as the feathers on an arrow. There must be solutions out there for trawlers without booms...
__________________
"The most interesting path between two points is not a straight line" MurrayM
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12-09-2018, 05:41 PM
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#5
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TF Site Team
City: Brisbane
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 4,260
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My boat sails at anchor a fair bit as well. I think it is partly due to the high bow. using a bridle with attachment points part way back toward the middle of the hull helps a bit. But a lot of it arises from windage anyway.
Around Moreton Bay the anchorages can often be busy and some folks anchor closer than you would like. In that case you don't want to have a stern anchor or a shoreline! Also the tidal current reverse, so you definitely want to be able to swing around to the other direction when that occurs or there will be chaos with other boats nearby.
Next year I'm going to install some flopper stoppers for reducing roll when waves/wakes are at a different angle to wind/current. I think they might help reduce the sailing a bit as well.
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Brian
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12-09-2018, 05:42 PM
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#6
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Guru
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,714
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This keeps coming up. The problem is usually a lot of windage forward. Solutions are many, as are opinions about which works best.
Some include: Set the rudder hard over. Run a snubber line to a midship cleat to force the boat to ride at an angle to the wind/current. Set a drogue, sea anchor or just drag a long line, or even trail a bucket aft. A steadying or riding sail has worked for some, but most report no luck with one. Some have gone as far as setting two anchors, but personally I find that more effort than it's worth.
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12-09-2018, 05:47 PM
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#7
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Guru
City: Kitimat, North Coast BC
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 5,946
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As to why...
Do you have a nylon rode? If you do, then your boat would behave like ours.
In windy conditions, without the riding sail, our bow will fall off the wind presenting either the port or starboard side to the wind. The boat gets forced downwind and stretches the rode tight, then the boat springs back upwind when the rode releases it elasticity, and the bow falls off the other way for another ride downwind. Repeat.
The riding sail acts like the feathers on an arrow, reducing the yo-yo effect and the swinging. This also reduces shock loading the anchor every time the boat bounces on the rode.
__________________
"The most interesting path between two points is not a straight line" MurrayM
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12-09-2018, 06:22 PM
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#8
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Guru
City: Quebec
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 4,374
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Is this an issue? I mean mine swing when there is some wind, gently in light wind, more intense in heavy wind, however it has never been an issue. Look through windows it looks like cinemascope
L
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12-09-2018, 07:26 PM
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#9
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Senior Member
City: Orange Beach, AL
Join Date: Jan 2016
Posts: 150
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What about a sea anchor off the stern. If you have any tide running it should help with the swing. Maybe would dampen it a bit. I use one when drift fishing to keep the bow into the current, seems to stabilize the boat.
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12-09-2018, 08:49 PM
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#10
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,293
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A bridle might help. Sea Dog make a plate which fits on the chain,you attach 2 lines, one to each top corner drilled hole, through each hawse hole back to the bow cleat.
It`s as much a function of how much boat is under the water as anything else. Next time you are anchored look at the Rivs and "sports boats" with planing hulls, they really hunt around an anchor or mooring.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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12-09-2018, 09:40 PM
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#11
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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Mine swims pretty badly in some anchoring conditions. I've messed with various solutions, none worked very well and were generally a PITA. So now I just ignore it. Boat swims. Have a beer and go to bed.
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12-09-2018, 10:00 PM
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#12
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Guru
City: Vallejo, California
Vessel Name: Mahalo Moi
Vessel Model: 1986 Grand Banks 42 Classic
Join Date: Jun 2008
Posts: 2,093
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Quote:
Originally Posted by Ski in NC
Mine swims pretty badly in some anchoring conditions. I've messed with various solutions, none worked very well and were generally a PITA. So now I just ignore it. Boat swims. Have a beer and go to bed.
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I’ll try your solution next time!
I’ve never tried it, but I’ve read that one can tie a line near the stern and tie a hitch on the bitter end of the line to your anchor rode. Tighten the line enough to pull the stern a few degrees to the side. Supposedly this will remove a lot of the “fish tailing”. I can also imagine that by doing this could create a recipe to increase fish tailing. I’ll go back to sleep now...
__________________
Ray
"Mahalo Moi"
1986 GB-42 Classic
ΜΟΛΩΝ ΛΑβΕ
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12-09-2018, 10:29 PM
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#13
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 3,021
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A drogue or sea anchor as far behind as practical. The further behind the sea anchor the more leverage it has in keeping you straight. Usually trailed behind with a buoy back about 2/3 of the line length. Never use chain, only line. The buoy helps get the sea anchor far behind you. Otherwise in shallow water the sea anchor ends up on the bottom right behind the boat. In the ocean in swells or a current you don't need the buoy.
Also a longer anchor line helps. A short scope makes the osculations worse.
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12-09-2018, 11:00 PM
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#14
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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Osculations? Why are we talking about smooching, when we were't?
__________________
Don't believe everything that you think.
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12-10-2018, 05:46 AM
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#15
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Guru
Join Date: Oct 2007
Posts: 22,553
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A quick fix that only works sometimes is to tie off to a fwd. cleat that is NOT in the boats center line.
A stern tie can also work tho it screws up the boats natural ventilation.
Giving the boat a sheer looks funny to passing sailors , but sometimes quiets a dancing queen.
There is too much boat house fwd of the boats pivot point so you have a backwards weather vane..
An aft riding sail works well , if the vessel can rig it.
Easy to try, tho small, is a windsurfer mast and sail.
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12-10-2018, 06:47 AM
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#16
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Guru
Join Date: Jun 2008
Posts: 5,034
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Think of it as a panoramic view of the anchorage
__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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12-10-2018, 08:19 AM
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#17
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Guru
Vessel Model: Nordic Tug 37
Join Date: Sep 2015
Posts: 1,107
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Hi,
I have noticed a shorter chain line out to reduce the sailing of 1: 2 up to 1: 3, but notice the Baltic Sea is not a tide and this is bosible.
NBs
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12-10-2018, 09:37 AM
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#18
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Less windage forward or more aft is needed. try lowering the bimini and see what happens.
Any sort of sea anchor needs a current to work, slow movement of the boat will just take up the slack in its line.
Put some water toys on the side deck aft.
The key is to unbalance the wind effect on the boat
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12-10-2018, 10:47 AM
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#19
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Veteran Member
City: Monroe
Join Date: Oct 2017
Posts: 32
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Too much swinging on a boat at anchor? Sounds like you guys are having some really good parties.
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12-10-2018, 10:58 AM
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#20
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Guru
City: Inside Passage Summer/Columbia River Winter
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 8,046
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Quote:
Originally Posted by Casey6404
Too much swinging on a boat at anchor? Sounds like you guys are having some really good parties.
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And we haven't even started winter yet!!
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