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Kari Hyttinen and Immi Wallin from Finland had worked together with 3D photogrammetry on a number of high-profile wrecks around the world, and so were another natural pairing.

To avoid congestion of the changing areas and the dive deck, to marshal all 12 divers, we subdivided them into two teams of six. Team 1 would get dressed in their thermal undersuits and drysuits in the covered dry changing area well in advance of slack water. They could then move aft outside onto Huskyan’s expansive dive deck and start prepping and getting into their rebreathers.

Team 2 would then get dressed in their drysuits in the changing area and would then assist the Team 1 divers, who were by now getting into their CCRs and clipping on bailout (stage) cylinders. Once slack water arrived and the Team 1 divers were beginning to jump into the water, Team 2 would be assisted by boat crew in getting into their own rebreathers and getting ready to splash. In this way, with the second wave of divers entering the water some 10 minutes after the first group, we managed to avoid 12 divers trampling all over each other and valuable kit. With bottom times down on the wreck of 35 minutes and run times inwater including trapeze decompression of about two hours, all the divers would be able to rendezvous on the trapeze for the final cast off and drifting deco hang.