anchor advice

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zomdread
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Thu May 26, 2016 10:55 am

Hay guys
just after a little anchor advice. I have been using a 1.5kg graple anchor with 1m of chain and it works well most of the time. But when the tide becomes more active and im only on sand im only slowed down not held in 1spot.

I was going 2 get a larger bruse anchor but the guy at burnsco recomended a 2m chain on the anchor i all ready have. Any thoughts on what I should do?

Any advice on this topic would help.
Thank you all.
Will
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MikeAqua
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Thu May 26, 2016 11:04 am

I would try more chain before going to a bigger anchor. I have 4m of chain.
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WaikatoYakka
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Thu May 26, 2016 11:29 am

Chain is effective though I have no chain at all.

I put out lots more warp, approx 4 times the depth I'm in.
No issues with slippage at all.
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rainbow
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Thu May 26, 2016 12:05 pm

Your drifting could be caused by a number of reasons but not by you choice of anchor. The 1.5kg folding anchor is just fine for even the biggest tidal current or big swell. As others have said your chain might be too light or too short to keep the anchor lying horizontal to remain dug in or you may not have released enough warp to get a shallower angle or you may have a warp system with no "give" I use 1.5m of 8mm bungee as a shock absorber when a swell or a strong wind gust hits the kayak. Others use a small buoy to the same end. It is amazing how firmly this anchor holds in sand/mud when you try to pull it up. During this operation I am always prepared to slip warp to avoid capsizing when a big swell lifts my kayak.

BTW never use this anchor on reefs, even with a breakaway link; eventually you will get snagged for good.

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Dreadfish
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Thu May 26, 2016 12:21 pm

I use the .5kg foldaway anchor and i never slip even in the strongest of currents... i do have 4m of 6mm chain though as is suggested above. length of rope put out should be a minimum of twice the depth is what ive always been told
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MadMike
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Thu May 26, 2016 2:31 pm

The chain anchors the kayak and anchor anchors the chain...Chain prevents the end of the anchor being lifted up effectively disengaging it... no chain or too short a chain and you won't hold. I just figure WY has no issues because his anchor is a shark jig, he's a bit of a shark magnet you see and they hold him in place.
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zomdread
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Thu May 26, 2016 4:27 pm

Awesome thank you for all your advice.
A longer chain is what I will go for.

How important is it for me to have a Breakaway system? And what's the best way to set up?
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Blazer60
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Thu May 26, 2016 4:59 pm

If you are the anchoring kind, and not all yakkers are, then 'breakaway' can be applied at the anchor or nearer the yak. These example discussions should demonstrate the difference. Follow the general thread of discussions and see how guys apply what works for them to either situation.

http://www.kayakfishingnz.com/forum/vie ... se#p223722

http://www.kayakfishingnz.com/forum/vie ... ay#p163085
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dedant
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Thu May 26, 2016 5:03 pm

How's this?
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rainbow
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Thu May 26, 2016 8:54 pm

No idea what this breakaway link is made of? As an important guide you must be able to break it while still sitting in the kayak. I use and have tested in real anchor situations a breakaway link made from a 2mmX100mm cable tie. This is strong enough to hold me but not so strong that I can not break it when I need to. Whatever material you use make sure it covers both points. Also you need to maintain slack between the shackle holding the breakaway link and the fixing point at the head of the anchor. If it is too tight you can't break the breakaway link.

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AndrewRawlingson
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Fri May 27, 2016 3:03 am

If you want to try something different, these are excellent at holding on sand and kayak friendly. Tracking one down in NZ may be difficult though.

http://cooperanchors.com/" onclick="window.open(this.href);return false;
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jaypeegee
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Fri May 27, 2016 9:23 am

I have been thinking about the required chain length for a while
My understanding is this and if it is fundamentally flawed please point this out so we can learn...

A folding grapnel anchor works if one or two of the tines is digging into the bottom and that the shank also is resting on the bottom.
When the shank starts to lift the tines are likely to lose purchase
The chain has a primary function as a weight to hold the warp at a lower angle and a secondary function in reducing jerks and pulls transmitted from the vessel back to the anchor from swells.

So, The more chain length and weight that is used the more likely that the anchor function as designed and will hold.
But more chain length and weight requires more effort to store and carry and this definitely is a less is more scenario..
So I start to wonder the following has merit

Assuming that the same chain, grapnel anchor weight and scope is used in the following setups.

Anchor->1m of chain ->Warp
Anchor->2m of chain ->Warp
Anchor->4m of chain ->Warp
Anchor->4m of warp ->1m of chain->warp
Anchor->4m of warp ->2m of chain->warp

Which would likely hold best?

Dreadfish
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Fri May 27, 2016 9:53 am

depends on the vessel. i believe that the recommended length of chain is equal to the length of the vessel. so a 5m kayak should have a 5m chain of suitable size. the main point here is the chain size.... no point in having 5m of 25mm chain (way overkill) but also probably no use having very small chain either. as above i use a .5kg anchor but have approx 1.5 to 2kg of chain. no real difference weight wise to having a 1.5 or 2kg anchor with small short chain except the better drag reduction in the longer heavier chain
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Mental
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Fri May 27, 2016 10:55 am

As Dreadfish said a good rule of thumb for any vessel be it kayak or boat 1m per meter of boat is a good guide so given your options I'd go for Anchor->4m of chain ->Warp
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jaypeegee
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Fri May 27, 2016 2:30 pm

God.

In an attempt to understand the accepted theory of chain to line to scope I went here

http://alain.fraysse.free.fr/sail/rode/ ... forces.htm" onclick="window.open(this.href);return false;

ALL the math.

Now my head hurts

Dreadfish
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Fri May 27, 2016 3:50 pm

:rock: clear as mud....
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sk8e8
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Sun May 29, 2016 7:41 pm

No idea why, but I just read the whole site....

Interesting
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jaypeegee
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Mon May 30, 2016 9:31 am

sk8e8 wrote:No idea why, but I just read the whole site....

Interesting
I looked at it through the wayback machine and downloaded the spreadsheets to try and work out the dynamics.
May have another crack at understanding it but yeah. Pretty complex.

zomdread
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Tue May 31, 2016 7:54 am

Is it the length of the chain that is essential or is it the weight alone that holds the anchor?
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Mental
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Tue May 31, 2016 9:12 am

It's the length that keeps the anchor pulling in the horizontal rather than the vertical but of course the weight is a factor too, anchors are designed to work with a drag force not a lifting force, a good setup would be a small .75kg folding anchor with 4 meters of 5mm chain (or 5 meters of 4mm chain). That should see you right for most conditions, if it's really bad you could add another two meters of chain to the set up...
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