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We had a problem with Hms Pheasant (85m) for the same reasons, although we dont anchor into wrecks the problem is the same to get a good shot into a deep smallish wreck. We resolved it by putting in a first heavy marker and waiting till it sets and shows a slacking tide, using two buoys on the line means that when the second one is visible then its getting slack. A second marker is then set on the wreck. With the tide coming slack then you have a better chance of getting a vertical drop. Not fixing the boat in means a lot less strain on the shot. Although not perfect we generally get good results with this. I should mention that on the Pheasant we got currents of up to six knots and slacks at neaps of only 15-20 mins so we had to be quick, divers had to be kitted up and ready before the final shot was placed. Regards In message <199611060325.WAA14768@an*.mi*.co*>, Jim Cobb <cobber@mi*.co*> writes >A method you can use for high current wrecks is to basically do a drift >dive. Get upstream of the wreck, drop off the boat and head to the bottom >and let the current drift you into the wreck. If you miss the wreck, too >bad, surface and call it or try again. If you hit the wreck, do your >thing and then use a lift bag for a drift decom. The boat will never >anchor so you will need a skipper who is on the ball. > > Jim > > >>I'm interested in any ideas as to the best way to anchor or dive this wreck. >>It is in 80msw, small, surrounded by reef and prone to huge currents and big >>seas. The last 2 times we have tried the anchor was on reef and the next >>time we tried with a shot line it a) ploughed a furrow and was miles away >>from the wreck by the time we got down due to huge current and b) the bouy >>was dragged underwater(35m) due to the drag caused by 3 divers in full kit. >>The only solution appears to be to anchor and if it has not stuck in 30secs >>to retreive it and try again as it will most likely be on reef. The anchor >>often pulls out however due to the drag of the divers descending the line >>when there is current. >>Any thoughts would be much appreciated. >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. -- John Thornton
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