Anchoring (scope)

[Guest]

For what its worth the RNLI make the following reccommendations for a 36' boat.
1) If all chain then 3-4 times depth at HW
2) If warp then 5-6 times depth at HW
3) If warp used then 5 mtrs chain be fitted to anchor
4) If all chain used a rope link on the bitter end so that it can be cut free quickly or used to extend by using warp
5 Main anchor to be not less than 33lbs. Kedge to be 15lbs
6) Main chain = 8mm
7) Main rope = 12mm
8) Kedge chain = 6mm
9) Kedge rope = 10mm
Hope this is of some help, but as you can see from all the other posts its a very emotive subject.

 

[peterk]

Re: two hooks

hi N,

if Vee I set my anchors 60 degrees or more apart.

If current, I let out a lot more scope than I need
to drift way back,
I drop my second anchor
and then haul myself back towards the first one.
Practice does it...

I only use a swivel between the two
if I plan to stay longer and the current changes often -
- as in tidal - rel. rare in long distance crusing.
At least in the areas I can sail/row into.

hang in there, baby...

peter, www.juprowa.com/kittel

 

[carey]

Thanks for the info and yes that would be great if you could send more data.We generally cruise in an area called The Pittwater which is reasonably protected and is located just north of Sydney Harbour (Australia) and it is a very pretty part of our coast

Many thanks
John

 

[vyv_cox]

Re: Hiscock \"Cruising under sail\" advises ...

I've never read Hiscock, but my experience (obviously less than his!) has led me to the same point. I carry 55 metres of 5/16 on a 35 lb Delta, a spare 25 lb CQR, a Fortress (forget the size but one bigger than recommended) on a few metres of chain and 50 metres of 16 mm Anchorplait. The kedge warp is made up with shackles so that we can mix and match as required, such as feeding the chain through buoys with iron rings.

I also have a short length of nylon 12 mm with a special hook on one end, to attach to the chain. Having anchored on the chain I hook about 2 metres of chain into a bight with the nylon, eliminating chain rattle in the forecabin and giving a certain amount of spring. I carry two more 50 metre lengths of three-strand warp, one 14 mm and one 12 mm. These are primarily for shore lines in the big rafts that we used to join in Ireland, Isle of Man and other places with big tidal ranges, but we have also used them for anchoring if necessary.

 

[Mirelle]

whatever are you doing?

I also use a 45lbs CQR in mainly sand, mud and sometimes clay. 3:1 scope. Never had a problem. Since I very often bring up under sail and just lies back, rather than motoring backwards, if anything I should be the one with problems!

I use 7/16" (say, 12mm) chain. As I have said before in the Scuttlebutt thread, the CQR must be snatched into the ground with a jerk, not tugged gently backwards, so one should pay out scope faster than the boat is paying off, then belay.

Do you also disagree with my substantive point about the limited value of scope in shallow water?

 

[gunnarsilins]

Thanks vyv!

I will explore the battle between CQR, Delta, Spade and Bruce further on and see if there are more opinions to get!