Anchors

[chappy]

Can someone please help, i need a good sight to tell me what size anchor i need for a 27 ft yacht, i have seen jimmy greens sight but is there anymore that i can look at, i am finding this very frustrating to find out what will be the correct size.
The sort of anchor i want is a Bruce, is there anyone out there with any ideas? /forums/images/graemlins/confused.gif

 

[TigaWave]

seeing as the MCA code is still open at the same page...
9m boat
Anchor mass Main 11Kg Kedge 5Kg
Easy...I went for slightly larger, this should be seen as a guide/minimum requirement for codeing.

 

[silvertop]

Maximum Boat Minimum Shackle Chain Nylon rope
length of displacement weight of anchor size Dia Size
of boat kg kg lbs mm mm mm

Dinghy, tender, Optimist 2 4.4 8 6 6
Dinghy, inflatable boat,
small catamaran up to 4 m 300
Towable sail/power boat 3.5 7.7 8 6 6-8
up to 5.50 m 800 6 13 8 6 10
6,50 m 1 8 17 8 6-7 10
7.50 m 2 10 22 10 8 14
10.50 m 4.5 14 31 10 8 14
12.50 m 8 16 35 12 10 18
16 m 12 20 44 12 10 18
18 m 16 24 50 16 12 22
20 m 20 34 75 16 14 24
25 m 30 40 88 16 14 24
+ 25 m

 

[silvertop]

That went pear shaped didnt it !

 

[TigaWave]

and I thought 16m was 30 15 10 8 12

 

[silvertop]

Is it log or trig never did either at school!

 

[chappy]

I can't make head or tail of your diagram silvertop, sorry.

 

[TigaWave]

Logs are terrible anchors, twigs even worse

 

[silvertop]

what it is saying quite simply, between 10 & 15 kgs.

Simple when you havent a clue.

I put it down to old age.

 

[silvertop]

Boat Anchor weight
Up to Kg Lbs
7.50 m 2 10 22 10 8 14

Hope this one works

 

[snowleopard]

why a bruce?

you'll need a much bigger one than if you chose a spade or delta.

 

[webcraft]

A 27 footer can be anything from 2.3 - 4.6 tons so there's no exact answer.

Windage also plays a part, as does anchor type.

Ease of deployment/stowage may also be a consideration.

For a Bruce, depending on the factors mentioned above, something between 10Kg and 15Kg. Most 27 footers choosing a Bruce probably use a 10Kg, but heavier displacement ships (eg Vancouver 27, 4.06 tonnes) maybe would go for the 15Kg model.

One good yardstick is get the size that wil allow you an uninterrupted night's sleep when it's blowing 30 knots. Sometimes only experience will tell. A lot of people will tell you get the next size up, but disturbed nights are caused by bad anchoring technique more often than undersized hooks IMHO.

- Nick

 

[branko]

Always take for boat one size up (chain and anchor) and you never will have problems ( take anchor Delta or CQR or Bruce for main).

 

[Lee_Shaw]

15 kg about right.

 

[snowleopard]

you can look up the manufacturer's advice here but to summarise, their advice for a boat in the 20-30 ft range is:

CQR: 7kg, max 9/11kg

Delta 4/6kg, max 10kg

Claw (bruce type) 5/7.5 kg, max 10/15kg

in your situation i would go for a 6kg delta or a 7kg CQR.

 

[dickh]

No problem, my Jaguar 27 had a 20lb CQR and I never had a moments anxiety about it - certainly in East Coast mud! In weed it's a different matter................

 

[srm]

Any anchor needs sufficient weight to penentrate the sea bed. Regardless of all the bumff or size of boat I would not trust any anchor under 30 lb / 13 kg if I was going to sleep. Basically, the bigger the better and at least 10 metres, preferably more, chain plus rope.

Same applies to kedge anchor, if its less than 30 lb its unlikely to work when you really need it and 30 lb to 60 lb anchors can be run out in a dinghy with a bit of care. (The heaviest I have laid by dinghy was a 50 kg Bruce from a 17 ft inflatable in calm conditions).

Sean.

 

[Mirelle]

I agree, certainly for CQRs and fisherman types. Not enough experience of others.

Not everyone knows how to lay a big anchor from a dinghy, so for those who don't make a habit of running aground as often as I do - hang it off the stern on a lanyard with a slipknot and slip the knot at the pyschological moment. Attempts to throw a large anchor overboard from a dinghy may be comic or tragic, depending on the conditions for swimming, but are seldom effective!

 

[Gunfleet]

[ QUOTE ]
Not everyone knows how to lay a big anchor from a dinghy

[/ QUOTE ]
Don't keep it to yourself, share your technique.

 

[Mirelle]

At risk of swinging the lamp a bit

I have laid a 112lb Fisherman from a 7ft 6ins pram, once...

Get the dinghy securely alongside (a stern painter helps) and lower the kedge over the side of the yacht so that it hangs off the stern of the dinghy. Belay it there with a small rope taken through the shackle or ring and belayed round the thwart with a slip knot (if the dinghy is an inflatable, this won't work, but with an Avon you can use one of the rowlocks, or sit on the lanyard).

Flake the warp into the dinghy, and row upwind/uptide as fast as you can until the warp is all paid out. take a couple of extra strokes and slip the slipknot on the lanyard.

The essential bit is that the anchor is never in the dinghy.

Attempts to throw the anchor out from a small dinghy are likely to result in capsize of a rigid and falling overboard from an inflatable. Either comic or tragic depending on circumstances...