Anchors away - Page 2

willk · 04 February 2010, 16:57

Quote:

Originally Posted by Jizm

but only seems to hold well in a rocky situation.....

Tricky if you need it in a sticky situation so...

Paul Beaurain · 04 February 2010, 20:14

Hi there

From what I see there may some large anchors on too little chain.

I believe that a smaller anchor and much more chain gives a better job.

It can stop you veering around and keeps the pull horizontal on the anchor.

If you anchor near other boats they will often lie differently to the wind/tide and you want the smallest circle to lie in.
Paul

Puffin · 04 February 2010, 20:25

Quote:

Originally Posted by Paul Beaurain

From what I see there may some large anchors on too little chain.

What length of chain would you recommend, is there any rule of thumb for amount of chain for weight of anchor/ length of boat, ratio of chain to warp etc?

Puffin

chewy · 04 February 2010, 20:52

Quote:

Originally Posted by Puffin

What length of chain would you recommend, is there any rule of thumb for amount of chain for weight of anchor/ length of boat, ratio of chain to warp etc?

Puffin

Rough rule of thumb have the chain the same length as the boat.

neilda · 05 February 2010, 05:09

Quote:

Originally Posted by Jizm

Recommended by who?
I have one, I like the way it stows nicely but only seems to hold well in a rocky situation.....

It was recommended by the chandlers I went to - as he had every type of anchor under the sun, I felt it was a moderately unbiased view point. I've not used one before so have no idea how it might perform.

Dry_Doc · 05 February 2010, 09:54

Quote:

Originally Posted by Puffin

What length of chain would you recommend, is there any rule of thumb for amount of chain for weight of anchor/ length of boat, ratio of chain to warp etc?

Puffin

MGN280 (commercial code requirements) gives the minimum anchor cable as 4x boat length or 30m (whichever is longer) with minimum 10m or 20% of the total length as chain.

m chappelow · 05 February 2010, 11:37

problem with a lot of anchor, chain and length of anchor warps is, most ratio,s were calculated many years ago with heavy displacement boats or deep keeled yachts in mind, in gale force conditions using standard admirity pattern or traditional fishermans type anchors,, much before the popular advent of small planing craft ,and the inroduction of modern designed high hold anchors ,have to agree though even the smallest boats need a 3/ 4 meters of chain if not to help with the scope but to stop chaffe and wear on rocks ,and a lot depends on the type of sea bed that you are going to anchor in .

jyasaki · 05 February 2010, 15:26

For ground tackle, you sort of have to balance what you're doing with what the guys who made the suggestions were doing. For instance, the 7:1 minumum scope suggestion was based on a fairly large boat anchoring overnight in areas where high wind and swell were likely. For a recreational boat, anchoring for, say, a few hours, that would be overkill (though granted, it would still work well.)

For diving in Central California, we usually use a scope of 3 or 4 times the depth if it's windy or swells are up; as little as 1.5 or 2:1 if it's calm. In general, we aren't off the boat for more than about an hour or so.

Dry Doc's suggestion of 4x chain would have the chiropractors here really happy, but I doubt that any of the smaller boats would follow it anyway. I could see it for a ship doing work in open ocean, but not for a RIB doing recreational stuff.

jky

Dry_Doc · 07 February 2010, 07:49

Quote:

Originally Posted by jyasaki

Dry Doc's suggestion of 4x chain would have the chiropractors here really happy, but I doubt that any of the smaller boats would follow it anyway. I could see it for a ship doing work in open ocean, but not for a RIB doing recreational stuff.

jky

4x boat length refers to total length of chain and rope!

BogMonster · 07 February 2010, 08:15

Quote:

Originally Posted by m chappelow

problem with a lot of anchor, chain and length of anchor warps is, most ratio,s were calculated many years ago with heavy displacement boats or deep keeled yachts in mind, in gale force conditions

Overkill is good

I rarely use my anchor but I would rather have a lot of chain/rope in the bow and not use much of it, than one day need a lot and not have enough. A bit of weight in the bow is good for keeping aviation levels down as well

Jizm · 07 February 2010, 09:28

Quote:

Originally Posted by neilda

It was recommended by the chandlers I went to - as he had every type of anchor under the sun, I felt it was a moderately unbiased view point. I've not used one before so have no idea how it might perform.

Fair enough, mine is ok, bit rubbish in the soft mud we have in places round the solent area etc.

m chappelow · 07 February 2010, 10:08

Quote:

Originally Posted by BogMonster

Overkill is good

I rarely use my anchor but I would rather have a lot of chain/rope in the bow and not use much of it, than one day need a lot and not have enough. A bit of weight in the bow is good for keeping aviation levels down as well

got to agree with you on not having enough, but where do you draw the line at overkill,,,,,,,,i normaly take a couple of different anchors with me just incase i need to keep the bow down and i get pushed onto a lee shore ,,lol,,,only ribbing ..,regards mart

Andy B · 07 February 2010, 11:34

So now everyone has got themselves the right anchor, chain and warp!
And now finds themselves in that age old problem of a snagged anchor!

Are there any tried and tested ways to get out of this?
Or is it just a case of driving around until it comes free!

The reason i've asked is that i've been told, more than once to attach a line to the bottom of the anchor for just this reason. But seams like just another mess in the locker!

Cheers
Andy

m chappelow · 07 February 2010, 11:52

some shackle the main chain to the bottom end of the anchor ,then run the chain up to where the main eye is,and then put a few cable ties around that ,so that the strain is taken on the bottom end ,but if it gets stuck the cable ties break and then the anchor then trips and pulls itself out backwards ,,,another way is to bouy the anchor with another line running to the bottom end of the anchor so that again can be pulled out backwards ,as you said its more clutter aand tangles if your not carefull ,,,,,novices tend to get anchors stuck because they dont get the boat right above the anchor when trying to retrivie it ,,,if you can get right above the stuck anchor or beyond it , then when the bow drops in a wave pull it tight and let the next wave raise the bow it can help free it ,,,if its a high hold anchor eg a BRUCE they can dig in mud really deep and it take a while for it to break out .,,,,suppose a stuck anchor is a problem that goes back thousands of years ,and apart from thrusters even the big brains of the modern world havent come up with anything to replace them ,,mart

Sonar · 07 February 2010, 13:25

Quote:

Originally Posted by m chappelow

some shackle the main chain to the bottom end of the anchor ,then run the chain up to where the main eye is,and then put a few cable ties around that ,so that the strain is taken on the bottom end ,but if it gets stuck the cable ties break and then the anchor then trips and pulls itself out backwards

The way I do it.!
Never failed to retrieve the anchor for me.

m chappelow · 07 February 2010, 13:34

Quote:

Originally Posted by Sonar

The way I do it.!
Never failed to retrieve the anchor for me.

with the amount of debris from old wrecks in the area you need it theres a old middlesborough bus offshore somewhere ,,,once got an anchor stuck in part the old Zepplin airship, that was shot down in ww1, when it did finally come up it had an 8ft section of corroded ally framework still stuck in it ..lol

Sonar · 07 February 2010, 13:39

Quote:

Originally Posted by m chappelow

with the amount of debris from old wrecks in the area you need it theres a old middlesborough bus offshore somewhere ,,,once got an anchor stuck in part the old Zepplin airship,, when it did come up it had an 8ft section of corroded ally framework still stuck in it ..lol

Was that local to us ?

m chappelow · 07 February 2010, 13:53

Quote:

Originally Posted by Sonar

Was that local to us ?

between seaton canoe ,,,, mind the pun ,,, ,missing canoeist turned up 5 years later in brazil,,, and hartlepool just about a mile offshore,,,its not often we go over that end nowadays we usually fish down Chewys way ,hes still in yorkshire,, ,know of a few lads that fish the outfall pipe from the powerstation over there though ,supposed to be good for sea bass ,

Sonar · 07 February 2010, 14:27

Quote:

Originally Posted by m chappelow

between seaton canoe ,,,, mind the pun ,,, ,missing canoeist turned up 5 years later in brazil,,,

Yep another guy just turned up in Frinton in a swan pedalo as seen on T.V.

BruceB · 07 February 2010, 15:23

I carry this lot on board, was clearing out and checking today for this season.
1 x 7.5kg Bruce with 5m of heavy chain and a 10m rope spliced on.
2 x 10m ropes
1 x 50m rope
1 x pellet bouy
1 x sea anchor
and when diving-
1 x large Bouy
1 x grapnel with 3m of heavy chain.
The Bruce and attached chain/rope is used for lunch stops and the rest of the rope is added as required for longer stops. The amount of chain is the most I can lift without a struggle

I have quite happily left the RIB overnight attached to this when out on the west coast, obviously in reasonably calm weather.