southernfreedom 0 Posted January 17, 2019 Share Posted January 17, 2019 gidday folks, ive had the misfortune of having a large steel anchore part ways with the chain right at bow roller. shackle bolt snapped!! i watched her drop into about ten meters of murky water in bay of islands. dived on air three times to no avail as zero visability. i have about a 50 m circumferance area where it is. any ideas on how. im thinking grapple? sharks in area and no viz means diving out. soft mud bottom. would a good fish finder pick it up?? thanks in advance Quote Link to post Share on other sites
Priscilla II 377 Posted January 17, 2019 Share Posted January 17, 2019 https://www.magnets.co.nz/shop/magnetic-tools-and-equipment/55mm-round-retrieval-magnet/ Quote Link to post Share on other sites
Jon 355 Posted January 17, 2019 Share Posted January 17, 2019 Grapple would be your best bet Fish finder may pick up something but you won’t know what it is It’s proba going to be in a pile if it broke way from the bow which will make it harder to find Quote Link to post Share on other sites
Kevin McCready 83 Posted January 17, 2019 Share Posted January 17, 2019 Neodymium magnets are incredibly dangerous and will fry any electronics they come near. The 100kg pulling force might be overkill. You could try a smaller Neodymium magnet or two in a stocking tied to a fishing line or light line, then follow it down once located. Needles and haystacks - good luck. Someone may also know about underwater metal detectors. Quote Link to post Share on other sites
Fish 0 Posted January 17, 2019 Share Posted January 17, 2019 If it were me, I'd use either the boat and the dinghy, or two dinghies, and tow as long a length of chain as you can across the search area, trawler / scallop dredge style. If its a soft mud bottom, the chain should hook up on your anchor. You could possibly loop the chain over it if you believe you've hooked it up (drive the dinghy around in circles at the end of the chain, then winch it up with your yachts capstan. Alternatively, if you think you've hooked it up with the chain, use your scuba, follow along the chain and grab it by hand. This is assuming you are comfortable diving in zero vis / wreck diving style, and with sharks, hmmm. Need to use chain so it sinks / sits on the bottom and doesn't bounce over the target. If you don't have much spare chain, you could use rope at each end and chain in the middle / to drag on the bottom. Or rope with your dive belt weights at suitable spacings, or just any other weights to hold a line on the sea floor and drag it across the area. Don't go too fast towing the chain. Need to make sure it sits on the bottom and doesn't bounce. Hopefully you can do this with the gear you have to hand. If you have your yacht anchored on the spare anchor, you can do semi-circles around it with the dinghy till you find it. You haven't said what type of anchor it is. If its a new Sarca Excell from Chains Ropes and Anchors, just go full-on, set off the EPIRB, light all the flares you have (at once) and declare a national emergency so either the navy or police dive squad can find it. If its not a Sarca Excell, flag it, have a rum, and go down to Chains Ropes and Anchors to replace it with a Sarca Excell. Quote Link to post Share on other sites
southernfreedom 0 Posted January 17, 2019 Author Share Posted January 17, 2019 good sh*t lads!! Quote Link to post Share on other sites
Priscilla II 377 Posted January 17, 2019 Share Posted January 17, 2019 Crikey sharpen up lads the anchor parted company with the shackle so grapple ain’t gonna grab anchor with no chain attached. Watch out for this critter. https://youtu.be/xb-Ngb_Dikw Quote Link to post Share on other sites
Crazyhorse 47 Posted January 17, 2019 Share Posted January 17, 2019 Trawl a length of fish net with weights top and bottom so it slides along the bottom. No floats. Quote Link to post Share on other sites
Priscilla II 377 Posted January 17, 2019 Share Posted January 17, 2019 CH obviously the hooch came out with the correct and effective alcohol content. Quote Link to post Share on other sites
Fish 0 Posted January 17, 2019 Share Posted January 17, 2019 CH obviously the hooch came out with the correct and effective alcohol content. No no, wandering mare said 'fish net', not 'fish nets'... big difference Quote Link to post Share on other sites
cj! 19 Posted January 17, 2019 Share Posted January 17, 2019 I'd dive it, the sharks shouldn't be an issue unless there have been reports of aggressive behaviour. A circular search is fairly straight forward to do. https://en.wikipedia.org/wiki/Underwater_searches#Circular_search Quote Link to post Share on other sites
Crazyhorse 47 Posted January 17, 2019 Share Posted January 17, 2019 Maybe the shark could lead you to it? Quote Link to post Share on other sites
Crazyhorse 47 Posted January 17, 2019 Share Posted January 17, 2019 Dont know if Priscillas choi No no, wandering mare said 'fish net', not 'fish nets'... big difference Priscillas choice of hosiery might work?? Quote Link to post Share on other sites
waikiore 397 Posted January 17, 2019 Share Posted January 17, 2019 Grapnel Quote Link to post Share on other sites
Fish 0 Posted January 17, 2019 Share Posted January 17, 2019 Grapnel There is no chain on the anchor, so the grapnel may be sub-optimal. Anchor parted from the chain on the bow roller - via the shackle failing. Quote Link to post Share on other sites
AJ Oliver 154 Posted January 18, 2019 Share Posted January 18, 2019 Let me know if you find my car keys . . Quote Link to post Share on other sites
rigger 47 Posted January 18, 2019 Share Posted January 18, 2019 Cost up your time, fuel, etc versus new anchor. One anchor I recovered had no chain on it so it can be done, it was tricky getting it on deck. But then snagging a 15tonne anchor with a 2 tonne grapnel was unlikely so getting it on deck was not really considered. An interesting exercise it was.... Quote Link to post Share on other sites
southernfreedom 0 Posted January 18, 2019 Author Share Posted January 18, 2019 hey ppl. its a large rocna anchor with half circle bar one side so potential to hook with grapnel 1700 to replace Quote Link to post Share on other sites
Rangi1 49 Posted January 18, 2019 Share Posted January 18, 2019 Insurance claim? Quote Link to post Share on other sites
Crazyhorse 47 Posted January 18, 2019 Share Posted January 18, 2019 Do you not think a LARGE square of strong netting with weights top and bottom dragged along the bottom won't work? Try it. I've seen it work. Quote Link to post Share on other sites
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