Reply
 
Thread Tools Search this Thread
 
Old 15 June 2006, 03:48   #1
Member
 
Country: UK - England
Town: Durham
Make: Humber Ocean Pro
Length: 7m +
Engine: Volvo D3 160hp
MMSI: 235034618
Join Date: Oct 2001
Posts: 74
Anchor for 7 metre RIB

I am about to take delivery of a 7 metre Humber Ocean Pro. I would be interested to know what people regard as a suitable anchor for such a boat as well as the length of warp/chain that I should be using.
__________________

__________________
Paul is offline   Reply With Quote
Old 15 June 2006, 03:54   #2
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
if on sand then a 5kg bruce will do the job, and chain the length of the boat is a good rule of thumb

i had one of those 4 legged umbrella style anchors initially in cornwall and on a slightly rougher day it would not hold but alices 5kg bruce held hers and mine, and did not budge an inch, so two boats on one anchor!!

bruces do not fold or anything so you wont pinch your fingers etc

the folding anchor thing i had is ok for rocks apparently

the 5kg bruce is around 25 quid and money well spent.
__________________

__________________
Hugh Jardon is offline   Reply With Quote
Old 15 June 2006, 03:58   #3
Member
 
Country: UK - England
Town: Durham
Make: Humber Ocean Pro
Length: 7m +
Engine: Volvo D3 160hp
MMSI: 235034618
Join Date: Oct 2001
Posts: 74
Thanks for the quick reply. How much warp do you attach to the chain?
__________________
Paul is offline   Reply With Quote
Old 15 June 2006, 04:13   #4
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
Quote:
Originally Posted by Paul
Thanks for the quick reply. How much warp do you attach to the chain?
About a boats length of chain or a tad less, as much warp as you can sensibly carry without jamming up your anchor locker. I always carry extra stored elsewhere on the boat. If the motor goes Phut with an onshore sea/wind, that anchor might be the difference between you and the rocks.
__________________
Alice is offline   Reply With Quote
Old 15 June 2006, 04:15   #5
Member
 
Nick Hearne's Avatar
 
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,246
How deep is the water you want to anchor in?
You want about 5 times your depth in rope
__________________
Nick Hearne is offline   Reply With Quote
Old 15 June 2006, 04:19   #6
Member
 
Jono's Avatar
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,127
I use a Danforth (type.. might not be genuine..) on my 7.0 'Umber.. I bought the biggest one that I could fit in the anchor locker and it sits ontop of the warp and chain nicely I think it was about 10KG.. it (and the chain) also helps trim the boat very nicely if I stick the auxilliary on the arse end...

PS.. you can never have too much warp, chain or anchor... if you're a devout coward..
__________________
Jono is offline   Reply With Quote
Old 15 June 2006, 04:21   #7
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
i purchased the cheap blue bailer twine stuff that works a treat but roy and alice took the piss but you can get 100's of m for a few quid. Initially purchased it as a stop gap as was cheap as chips until i could identify the best stuff to get. was around 6 quid for 60 m i think or even better.
__________________
Hugh Jardon is offline   Reply With Quote
Old 15 June 2006, 04:26   #8
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
Quote:
Originally Posted by Hugh Jardon
i purchased the cheap blue bailer twine stuff that works a treat but roy and alice took the piss but you can get 100's of m for a few quid. Initially purchased it as a stop gap as was cheap as chips until i could identify the best stuff to get. was around 6 quid for 60 m i think or even better.

Polyprop, lovely stuff. It catches fire if you load it up enough.
__________________
Alice is offline   Reply With Quote
Old 15 June 2006, 04:27   #9
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
Quote:
Originally Posted by Alice
Polyprop, lovely stuff. It catches fire if you load it up enough.
under water?


never did ask, what is the best warp to get that is cheap or reasonably priced?
__________________
Hugh Jardon is offline   Reply With Quote
Old 15 June 2006, 05:21   #10
Member
 
Country: Belgium
Make: Osprey
Length: 7m +
Engine: 250 HP E-Tec
Join Date: Nov 2004
Posts: 258
We bought a mooring package from plastimo:


46566 - Mooring package for boats : 6 - 8 m
Set : Kobra anchor 6 kg, chain, rope and shackles.

Kobra anchor 6 kg
Chain 10 m, 6 mm / Stranded polyamide 30 m, 8 mm
Galvanised bow shackle 8 mm
Total weight 16.4 kg.

Price is 175
__________________
Seaharrier is offline   Reply With Quote
Old 15 June 2006, 05:30   #11
Member
 
Country: UK - England
Make: Avon Searider
Length: 4m +
Engine: Yamaha 50
Join Date: Jan 2004
Posts: 5,654
I'm using an 8kg grapnel. I'm yet to test it but I think it should be fine for my boat (quite light). Bought it becasue it folds up so small. Had one on my 4.1m (2kg) and it held really well (had ten meters of chain attached though)
__________________
Tim M is offline   Reply With Quote
Old 15 June 2006, 05:59   #12
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
Quote:
Originally Posted by Tim M
I'm using an 8kg grapnel. I'm yet to test it but I think it should be fine for my boat (quite light). Bought it becasue it folds up so small. Had one on my 4.1m (2kg) and it held really well (had ten meters of chain attached though)
Hey Hugh, have a word re.grapnels and sandy bottoms.
__________________
Alice is offline   Reply With Quote
Old 15 June 2006, 06:10   #13
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
Quote:
Originally Posted by Alice
Hey Hugh, have a word re.grapnels and sandy bottoms.
grapnels are crap crap crap on sandy bottom, you could use a 2 or 3kg bruce instead of a 8kg grapnell and i am sure it would hold loads better. Bob and i used grapnells and we just could not hold, i got a bruce same as alices as that proved itself when we both anchored to it, bob is getting a new anchor as well i beleive

bruces are nice cos they dont have those moving bits that pinch your fingers

just our experience over the last two weeks

__________________
Hugh Jardon is offline   Reply With Quote
Old 15 June 2006, 07:31   #14
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,709
I haven't used it yet but I looked at the anchor on mine and thought it was a bit small, its a Danforth type not sure of the weight but prob about 8-10kg. Then I saw a similar sized anchor on a 12 tonne Halmatic launch and figured it should be OK for a 1/2 ton rib

On mine it is just the right shape to perch securely in the compartment in the bow sitting on top of the heap of chain and rope (think there is about 50m of rope).

Can I hijack the thread slightly; how often do folks think you should change the rope on the anchor? Deterioration of the chain is fairly obvious but rope....? It's probably the original one so about 6-7 years old.
__________________
BogMonster is offline   Reply With Quote
Old 15 June 2006, 09:14   #15
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by BogMonster
I haven't used it yet but I looked at the anchor on mine and thought it was a bit small, its a Danforth type not sure of the weight but prob about 8-10kg. Then I saw a similar sized anchor on a 12 tonne Halmatic launch and figured it should be OK for a 1/2 ton rib

On mine it is just the right shape to perch securely in the compartment in the bow sitting on top of the heap of chain and rope (think there is about 50m of rope).

Can I hijack the thread slightly; how often do folks think you should change the rope on the anchor? Deterioration of the chain is fairly obvious but rope....? It's probably the original one so about 6-7 years old.
Sunlight is prob the worst killer of rope. If the rope looks fine with no nasty abrasions etc and hasn't been kept in the sun you should be fine.

Know what you mean about OTT mooring tackle. I have 2x50m lengths of 16mm rope - that's over 300' in real money - plus about 20' of stupidly heavy chain and a 14lb danforth. Plenty of room for it all.

For day to day stuff I have a big folding grapnel - yet to try it though. I know they are crap in sand but they are better than most in foul ground.
__________________
codprawn is offline   Reply With Quote
Old 15 June 2006, 10:56   #16
Member
 
randski's Avatar
 
Country: UK - England
Town: Cornwall
Make: Waveline
Length: under 3m
Engine: Yamaha 2.5
Join Date: May 2005
Posts: 421
Quote:
Originally Posted by Hugh Jardon
Bob and i used grapnells and we just could not hold, i got a bruce same as alices as that proved itself when we both anchored to it, bob is getting a new anchor as well i believe

I got a 5kg bruce last week and used it at the weekend on the North coast. it held me and Ian Parkes well. (That's not just Ian - his boat as well) So much better than grapnells. and it fitted in the anchor hold...although there's no room for my spare fuel cans anymore - Ooops, I don't seem to have any spare fuel cans anymore!
__________________
Bob
randski is offline   Reply With Quote
Old 15 June 2006, 10:59   #17
Member
 
Country: UK - England
Town: knebworth
Boat name: phoenix
Make: xs
Length: 6m +
Engine: 115 opti
Join Date: Jun 2005
Posts: 193
Send a message via MSN to mark-f Send a message via Skype™ to mark-f
which anchor

My Personal choice after trying most of the anchors types over the years is a 5kg bruce which is rated as a storm anchor for powerboat upto 25" but a CQR or danforth are probably almost as good ( my view that is), i would use 10m chain, as the the rule of thumb of 1 boat length of chain then rope, is a minimum in my view!!

then make sure that your total chain & rope is at least 6 times depth, preferably 7 times if possible, really depends on how much you want to make sure you boat doesnt move too far from where you left it.

As to the folding grapnel type anchor, they make a good mud weight if unopened and they do pack up neatly on a boat......yep thats the only positives i can think of for them

mark
__________________
mark-f is offline   Reply With Quote
Old 15 June 2006, 11:13   #18
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
[QUOTE=randski] I don't seem to have any spare fuel cans anymore!

/QUOTE]

Last seen flyin' around the Penryn area!! Sorry Bob, are you on the water on Sat or Sun? If not I'll drop them up to your place.
__________________
Alice is offline   Reply With Quote
Old 15 June 2006, 11:17   #19
Member
 
Country: UK - England
Town: Saltash, Cornwall
Make: Rib less:-(
Length: no boat
Join Date: Sep 2002
Posts: 693
I have a 7.5 KG Bruce with about 30m of chain and 50 odd m of line.
Basically the biggest anchor I could get in the locker and you never know what might happen.
I also have a pickup bouy on the end of it incase I have to let it go because of a snag etc so we can retrieve it later.
We also have a 5kg CQR thats going to be rigged as a spare / lunch pick.
Jelly
__________________
Jelly is offline   Reply With Quote
Old 15 June 2006, 11:23   #20
Member
 
Richard B's Avatar
 
Country: UK - England
Town: Devon
Boat name: White Ice
Make: Ranieri
Length: 5m +
Engine: Suzuki 115hp
Join Date: Jul 2002
Posts: 5,015
A quick point here about the theoretical "scope" (ie how much anchor line to put out)....

If you are anchoring amongst other boats, put out a similar scope to everyone else, regardless of the theoretical calculation. If you put out much more, when the tide turns you'll swing around in a greater arc to everyone else and very likely either hit the other boats or tangle your lines.
__________________

Richard B is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 22:10.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×