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31 December 2019, 13:50
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#21
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Member
Country: UK - England
Town: Cheltenham
Make: Marex
Length: 9m +
Join Date: Oct 2011
Posts: 351
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As a general rule of thumb, I go with chain the length of the boat or a bit more and a kilo of anchor for each meter.
I would be happy with a 6kg anchor, 6m of chain and 40m of 12mm of 3 strand line.
Other will ha e opinions but I suggest the above would deal with virtually all situations quite well, given a sound sea bed.
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You Can't cross an Ocean unless you have lost site of shore.
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31 December 2019, 17:50
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#22
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RIBnet admin team
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,626
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Quote:
Originally Posted by boristhebold
I think most experienced boaters would disagree with you, if someones anchor is slipping and the boat is slowly drifting towards something nasty im sure they dont think gosh I wish I had more rope, I expect they think gosh I wish I had more chain down LOL.
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Then they are probably (but admittedly not always) wrong.
FWIW I think the comment Shiney was trying to make, which you took offence to, was you have no way of knowing if 5m would have been more than ample on the day when you used 10... in fact there’s a fairly good chance that no chain would have worked just fine too...
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31 December 2019, 18:00
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#23
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Quote:
Originally Posted by charliee
As a general rule of thumb, I go with chain the length of the boat or a bit more and a kilo of anchor for each meter.
I would be happy with a 6kg anchor, 6m of chain and 40m of 12mm of 3 strand line.
Other will ha e opinions but I suggest the above would deal with virtually all situations quite well, given a sound sea bed.
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^^^^^^^^^^^^^
Wot he said, though I’m sure I’ve heard that somewhere before :P:
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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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31 December 2019, 19:21
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#24
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Member
Country: UK - England
Town: Wirral, Merseyside
Boat name: Carpe Diem
Make: Ballistic
Length: 6m +
Engine: Evinrude 200hp
MMSI: 235109239
Join Date: Jul 2014
Posts: 91
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Training Bank
Quote:
Originally Posted by boristhebold
I would go for 10 metres of either chain.
One important point to consider is that an anchor,chain,rope combo isnt just for anchoring while in safe protected bays etc it's also a crucial bit of safety kit and you never know when or where you may need it.
I had an issue once of a fuel filter housing breaking which meant the engine cut out. I was in the main channel approaching poole harbour entrance in about 14 metres of water, the weather was moderate but with a strong wind that without deploying the anchor chain and line would have blown me onto the training bank and definately ruined my day and boat. (dont know why they call it the training banks as its concrete and rocks). With the anchor set-up deployed it stopped my drift but that was with 10 metres of chain and 40 metres of rope plus anchor, not sure if I had half that length of chain it would have been sufficient.
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Hi, I asked that question before because we have a Training Wall on the River Mersey and also the River Dee. I was told that it was because the line of underwater rubble or rocks placed there on purpose 'Trains' the river to run on a certain course to ensure the channel is scoured by the current for marine safety.
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31 December 2019, 19:25
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#25
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Member
Country: UK - England
Town: Romford Essex UK
Boat name: Sea Fury
Make: Bit of everything
Length: 5m +
Engine: Mariner 90 & 6
MMSI: 232026082
Join Date: Dec 2019
Posts: 115
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Quote:
Originally Posted by lakelandterrier
I agree, with PD, 5mm chain should be strong enough for your need. It's not holding morev than a tonne of boat. I'd go for a longer length of lighter chain.
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I use a 6 mm at 10 meters long......
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Regards RoyP
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01 January 2020, 01:36
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#26
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Quote:
Originally Posted by RoyP
I use a 6 mm at 10 meters long......
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There’s nowt wrong with overkill[emoji106]
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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01 January 2020, 08:47
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#27
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,768
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Quote:
Originally Posted by boristhebold
please try not to speak for me, yes of course I would know what and did not work, it is easy to tell if your anchor, chain and rope combination works well or does not, 10m of chain works well on my rib whereas only 5m would mean in some situations my rib would move as the chain and anchor would drag on tide and wave force.
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Oh trust me, the last thing I want to do is speak for you!
The ONLY way to conclusively say 5m was not enough would be to repeat the process with 5m. And preferably in a scientific way. So triplicate results. Same conditions. Same sea bed.
I've never had an anchor not hold with 4:1 or more on it and a boat length of chain. If I was leaving the boat, I'd want 7:1 on it, but that's partly to allow for changes in conditions, tides etc.
What I believe the OP was asking was does length or weight of the chain make the difference... Not sure we are any the wiser
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01 January 2020, 08:52
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#28
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,768
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Quote:
Originally Posted by jwalker
Unless you're anchoring regularly and needing to haul often over the same section of tube, I wouldn't worry too much about the chain on the tube. When you lift it it'll be wet and lubricated, often slippery with mud and/or weed. If you've not got it already, a bit of extra rubbing strake around and over the bow area is generally a good thing to have anyway and will allow you to haul your anchoring gear without issue.
Depending on current, wave angle, wind direction it's likely you're not going to just be hauling neatly over the centre of the bow each time.
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I don't think my concern is the chain being retrieved or deployed.
It is loaded chain. So if you have 10m if chain, and anchor in 2m with 3:1 you would have chain over the tubes (or strake) with load on it. For hours. With movement of tide etc.
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01 January 2020, 09:18
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#29
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,508
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The chain needs to be heavy enough and long enough to stop the chain leaving the seabed and pulling inline with the anchor at bed level and not lifting preventing drag so it needs to hold in all conditions. P for plenty IMO
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01 January 2020, 10:28
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#30
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by ShinyShoe
I don't think my concern is the chain being retrieved or deployed.
It is loaded chain. So if you have 10m if chain, and anchor in 2m with 3:1 you would have chain over the tubes (or strake) with load on it. For hours. With movement of tide etc.
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Yep, it's loaded and fairly static because of that. I get considerably more marking of the strake when hauling up. Actually, I use chain only, no rope.
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JW.
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01 January 2020, 10:39
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#31
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,768
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Quote:
Originally Posted by jwalker
Yep, it's loaded and fairly static because of that. I get considerably more marking of the strake when hauling up. Actually, I use chain only, no rope.
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I guess it depends on conditions.. how "snatchy" it will be
I prefer to have my anchor rope to my bow eye and then loose to the locker...
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01 January 2020, 10:59
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#32
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Member
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 5,304
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Quote:
Originally Posted by Pikey Dave
There’s nowt wrong with overkill[emoji106]
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X2
I've had to use/deploy an Anchor twice in serious situations over the years and was certainly pleased I didn't UNDERCOOK it!
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A clever Man learns by his mistakes..
A Wise Man learns by other people's!
The Road to HELL ..is Paved with "Good inventions!"
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01 January 2020, 11:13
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#33
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Member
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 5,304
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I prefer to have my anchor rope to my bow eye and then loose to the locker...[/QUOTE]
Not exactly sure what you mean.
My Anchor/Chain/Rope set up is permanently stowed in the front locker ...complete and ready to go.
If you have a decent strength/and length! Bowline ..attached permanently to your Boweye (Don't we all?) it takes just seconds un-stow and tie the Anchor line directly to it...and over she goes
__________________
A clever Man learns by his mistakes..
A Wise Man learns by other people's!
The Road to HELL ..is Paved with "Good inventions!"
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01 January 2020, 12:31
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#34
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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On by 6.5m I've had for the last 15 years a 7.5kg Bruce, 10m of 6mm chain and 30m of 14m anchorplait. This is what the MCA Code requires and considers it to be a piece of safety equipment of last resort - engine failed, being blown onto a lee shore by a F6+ and a swell. It has worked every time it was needed (2 breakdowns).
Would probably have worked with a smaller anchor and less chain.
However, it's a right royal PITA to deploy and recover over the bow. Unlike JWalker it does matter if you have to let the chain rub over the bow of your brand new white tubes!
Recently I've been carrying out some rescue boat and coaching duties and have had to anchor several times a day and the tackle above is overkill.
Last season I bought a ready use kit comprising of 4kg Delta, 5m of 6mm chain and 20m 12mm rope. This has been more than adequate where I have been using it. Generally less than 5m deep with a mud or sand bottom.
The 5m of chain isn't too heavy to haul back on board.
I'd recommend you go for the longer 6mm chain rather than the shorter 8mm.
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01 January 2020, 17:29
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#35
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Member
Country: UK - England
Town: Dartmoor
Boat name: Spirit of Adventure
Make: Brig
Length: 5m +
Engine: 50Hp Suzuki
Join Date: Nov 2019
Posts: 175
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Quote:
Originally Posted by jwalker
Unless you're anchoring regularly and needing to haul often over the same section of tube, I wouldn't worry too much about the chain on the tube. When you lift it it'll be wet and lubricated, often slippery with mud and/or weed. If you've not got it already, a bit of extra rubbing strake around and over the bow area is generally a good thing to have anyway and will allow you to haul your anchoring gear without issue.
Depending on current, wave angle, wind direction it's likely you're not going to just be hauling neatly over the centre of the bow each time.
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Thank you
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01 January 2020, 17:31
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#36
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Member
Country: UK - England
Town: Dartmoor
Boat name: Spirit of Adventure
Make: Brig
Length: 5m +
Engine: 50Hp Suzuki
Join Date: Nov 2019
Posts: 175
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Thank you !
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01 January 2020, 18:01
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#37
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,768
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Quote:
Originally Posted by Maximus
I prefer to have my anchor rope to my bow eye and then loose to the locker...
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Not exactly sure what you mean.
My Anchor/Chain/Rope set up is permanently stowed in the front locker ...complete and ready to go.
If you have a decent strength/and length! Bowline ..attached permanently to your Boweye (Don't we all?) it takes just seconds un-stow and tie the Anchor line directly to it...and over she goes ![smilie](https://www.rib.net/forum/images/smilies/smile.gif) [/QUOTE]
Well I don't think it's universally done I think people tie to a cleat on deck and so apply a load over the tube.
But you can't tie chain. That's my point. Too long chain you can't tie it off...
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01 January 2020, 20:10
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#38
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Member
Country: UK - England
Town: Dartmoor
Boat name: Spirit of Adventure
Make: Brig
Length: 5m +
Engine: 50Hp Suzuki
Join Date: Nov 2019
Posts: 175
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Quote:
Originally Posted by Searider
On by 6.5m I've had for the last 15 years a 7.5kg Bruce, 10m of 6mm chain and 30m of 14m anchorplait. This is what the MCA Code requires and considers it to be a piece of safety equipment of last resort - engine failed, being blown onto a lee shore by a F6+ and a swell. It has worked every time it was needed (2 breakdowns).
Would probably have worked with a smaller anchor and less chain.
However, it's a right royal PITA to deploy and recover over the bow. Unlike JWalker it does matter if you have to let the chain rub over the bow of your brand new white tubes!
Recently I've been carrying out some rescue boat and coaching duties and have had to anchor several times a day and the tackle above is overkill.
Last season I bought a ready use kit comprising of 4kg Delta, 5m of 6mm chain and 20m 12mm rope. This has been more than adequate where I have been using it. Generally less than 5m deep with a mud or sand bottom.
The 5m of chain isn't too heavy to haul back on board.
I'd recommend you go for the longer 6mm chain rather than the shorter 8mm.
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Many thanks.
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