Why is my anchor upside down? - Page 2 - SailNet Community
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post #11 of 18 Old 11-09-2011
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As your anchor comes to the surface, you should be looking over the side to see if it is fouled or not, have a load of mud or as you say up side down.
Take a large cresent wench and flip the chain and that should twist your anchor around in order for it to be housed.
But if the anchor is hanging by its crown instead of the shank you will have to figure out why you are fouling your own anchor with its chain.

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Last edited by Boasun; 11-09-2011 at 04:52 PM.
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post #12 of 18 Old 11-09-2011
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Mine is 50/50 on this. If I lower it back down a little and bring it back up often it will rotate the right way. Or just pull it around with boat hook.
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post #13 of 18 Old 11-09-2011
..........huh?..
 
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Quote:
Originally Posted by paulk View Post
This is obviously a problem related to magnetic variance. We've all seen the compass roses on our charts that show true and magnetic directions, with the caveat: +var 5'/yr, or something like that. The earth's magnetic field is continually shifting, and your anchor is now being twisted by this force just enough to have it come up into the chocks upside down, whereas before the variance was insufficient for this to happen. When people used rocks or cast bronze anchors this was not a problem, but with iron or steel, you are probably not the only one with this issue, though few like to admit it. In Australia, they have similar problems, but they turn the opposite direction when it happens. (Wombat can confirm this for you is you want to ask him.) Because the earth is flatter at the southern end, the earth's core is closer to the surface there, so the problem is actually worse there than in N. America. You could try anchoring in a less magnetically active area and see if that would help. Anchors can also be degaussed, which may be a simpler solution. Good luck!
That has got to be one of silliest explanations I've heard. Twisting anchor due to magnetic variance? That's absurd. No, what has happened is you've agitated some sea monster by anchoring in his territory and he is exacting revenge on you by giving your hook a twirl just before it surfaces. It's pretty common really. Just count yourself lucky .... I've seen more vengeful monsters either wrapping your rode around objects or even unsetting your hook in the middle of the night.

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post #14 of 18 Old 11-09-2011
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Quote:
Originally Posted by paulk View Post
This is obviously a problem related to magnetic variance. We've all seen the compass roses on our charts that show true and magnetic directions, with the caveat: +var 5'/yr, or something like that. The earth's magnetic field is continually shifting, and your anchor is now being twisted by this force just enough to have it come up into the chocks upside down, whereas before the variance was insufficient for this to happen. When people used rocks or cast bronze anchors this was not a problem, but with iron or steel, you are probably not the only one with this issue, though few like to admit it. In Australia, they have similar problems, but they turn the opposite direction when it happens. (Wombat can confirm this for you is you want to ask him.) Because the earth is flatter at the southern end, the earth's core is closer to the surface there, so the problem is actually worse there than in N. America. You could try anchoring in a less magnetically active area and see if that would help. Anchors can also be degaussed, which may be a simpler solution. Good luck!

Oh well spotted that man ... Anchors turn anti clockwise down under, clockwise up north. On the equator they are simply very confused and often require a cup of tea and a good lie down.

We tried DeGaussing our Bruce and he simply disappeared. Reappeared some time later with highly improbable tales of aliens, the Bermuda Triangle and 1942. After that experience he took tohis bed and the demon rum, hasn't been the same since. Of course we didn't believe a word of it though the USS Philadelphia tattooed on his swivel is mildly disturbing.


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Last edited by tdw; 11-10-2011 at 03:47 PM.
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post #15 of 18 Old 11-10-2011
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In answer to TDW's query, the product is called anchor straightener made by Maggi of Italy who make HT chain. I bought it here Anchor Straightener 8mm [ANSTRA068] - NZ$36.97 : SHOP :: Chains, Ropes & Anchors :: The Maritime Bondage Specialists
Other sizes are available and suppliers of high quality chain may also have it.
I tried the boat hook thing, the trouble was it sometimes took several shots. Lowering it a bit sometimes worked. Very stressful in confined quarters to be fiddling about.
However this thing works fine.
I also suspect that the position of the hole in the shank makes a difference. On the Manson using the lower slot changes the hang of the anchor and I suspect makes it more likely to reverse. Presumably the shape makes it likely to turn as it comes through the water much like a freewheeling prop.
I am not familiar with the shank details of the delta so don't know if there is any variation. Presumably both increased depth and speed of recovery increase the chances of twisting. Any mud would also change the balance.
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post #16 of 18 Old 11-10-2011
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Originally Posted by chris_gee View Post
In answer to TDW's query, the product is called anchor straightener made by Maggi of Italy who make HT chain. I bought it here Anchor Straightener 8mm [ANSTRA068] - NZ$36.97 : SHOP :: Chains, Ropes & Anchors :: The Maritime Bondage Specialists
Other sizes are available and suppliers of high quality chain may also have it.
I tried the boat hook thing, the trouble was it sometimes took several shots. Lowering it a bit sometimes worked. Very stressful in confined quarters to be fiddling about.
However this thing works fine.
I also suspect that the position of the hole in the shank makes a difference. On the Manson using the lower slot changes the hang of the anchor and I suspect makes it more likely to reverse. Presumably the shape makes it likely to turn as it comes through the water much like a freewheeling prop.
I am not familiar with the shank details of the delta so don't know if there is any variation. Presumably both increased depth and speed of recovery increase the chances of twisting. Any mud would also change the balance.
well Izzy reckons its the Kraken and who am I to doubt such a fine fettled pooch ?

Thanks for that Chris, I can't find them in Oz so i've ordered one from NZ. Be interesting to see how it works.

Cheers

Andrew

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post #17 of 18 Old 11-14-2011
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Just goes to show how high tech stuff is making our lives more complicated. From ancient times sailors used large rocks on a rope. Real sailors still sail the rode less raveled .
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post #18 of 18 Old 11-14-2011
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I did give my setup a good going over on the weekend and noticed that in fact the swivel is not spinning as freely as it should. The new gizmo should sort it out but it would seem that if I hadn't ordered the new Anchor Straightener a new swivel or shackle, would have been in order.

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