Anchor line length

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Jun 24, 2004
10
- - Babylon, NY
Well I know my anchor line is way too short. I plan to go to Block Island and fro safety feel the need for a new chain and line. We used to have 300' of line and 20' of chain - any suggestions? The greatest avg depth will be about 100'
 
May 6, 2004
196
- - Potomac
100 ft Anchorage?

7 to 1 scope is rule of thumb...are you really planning on anchoring in 100 ft of water? In the middle of Long Island sound? Seems to me 300 feet of rode is more than you will likely need. I'd double up though, two anchors, two rodes. Have a great trip...
 
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oceanis361

more then enough

Mike I agree with Drew. you have enough rode and chain but I would add a second anchor ( different type then your primary) Great Salt Pond is not that deep so you won't need a lot rode. There are also town moorings that you can tie on do that are very resonable Enjoy your trip!!! Doc
 
Sep 24, 1999
1,511
Hunter H46LE Sausalito
Don't listen...

...to anyone who would tell you that you have adequate rode unless they first know the boat displacement and the rode diameters. There are tables in books such as Chapmon's Piloting that will indicate necessary diameters of chain and rope needed to create a proper rode. Many cruisers will tell you that the minimum amount of chain necessary in a chain-to-rope rode is one foot per foot of overall boat length. Racers will often do with less than this because of weight considerations and the fact that they don't really plan to spend the night on the hook. Regardless, if you're planning to anchor ten tons of boat overnight in more than 10 fathoms, you're going to need a lot more chain than you've presently got. Are you certain about the 100' depths? Sounds excessive. The advice about having a second anchor and rode is excellent, but the first thing you ought to be checking is anchor/rode combinations people use in the area you're planning to cruise. The average depth of water you plan to anchor in is secondary to the bottom composition in the anchorage.
 
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Tom S

Mike, Block Island -- Greatest average depth

100 feet !?!.... I think you mean 10 feet. When I go to block island, I usually sneak up towards the dinghy beach on the eastern shore of the salt pond and its 6 feet at low tide (~11 feet at high). (I have a 4 1/2 foot wing keel) I've been sailing LI Sound for years and rarely do I anchor in anything over 20 feet of water. and I rarely do I have to put out more than 100 feet of rode. In fact while you are in Block Island you will be hard pressed to put out much more than as it gets very crowded in there I have been very successfull with my 44lb Spade anchore and only 15 feet of chain (5/16 HT chain and the rest 5/8" 8-Plait rode---> I know, I know..... I should have more chain - just never got around to it and this set-up has been working very well for me and when it looks like I want more weight on the rode I have a 18lb sentinel that I can drop down the rode -- seems to work well -- and I've been in a few good squalls. PS -- remember to put out enough rode for the high tide as 30 feet of rode would be adequate for a 6 foot depth (5 to 1) but at a high tide swing in some places of 8 feet which would bring you to 14 feet then that 30 feet of rode would only be a 2 to 1 ratio -- and you'll probably be drifting away at high tide. I see power boaters doing that all the time Just a FYI - I have a 36 foot Catalina and its probably at least 16-17,000 loaded.
 
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Tom S

Mike - sorry I didn't mean to imply that all of

the Great Salt Pond averages 10 feet -- just that you can find lots of anchoring locations that are. Below is a link to the chart -- just east of the G "13" can is the dinghy beach I was talking about -- you can't have a deep draft boat though....that is the BIG advantage of a wing keel.....and the reason I have one :) Click on the link below for the chart of the Great Salt Pond at Block Is.
 
Jun 24, 2004
10
- - Babylon, NY
Thanks

My concern was not for overnighting on the hook but rather slowing drift an emergency in BI sound. If the rudder went (fill in your own disaster).... So I did mean 100' not 10'. I also realize that it's simply not practical to have 700' of rope on my Hunter 27 (I do believe in at least a 7:1 ratio for being on the hook overnight. Quick question: do people generally throw over 2 hooks in the Great Salt Pond? I general throw over two in tight quarters.
 
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