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My group has a tag system to assist in knowing where everyone is. On the way down the shotline, at the beginning of the dive, we clip a plastic tag with our name on it onto a fixed ring on the shotline beside the trapeze carabiner that is to be unclipped to allow us to drift and ascend. On the way back up, each diver removes their name tag from the ring – so if your tag is the last one on the ring, you know everyone else is above you and that it is safe to unclip the trapeze and go drifting.

Like most technical divers, we also have a system that only red DSMBs are fired up on ascent if all is well. This tells topside boat cover that all is good. We also each carry a yellow DSMB and reel, which is only deployed to the surface to tell topside that there is a problem.

As a result of the area that Pathfinder lies in, although the underwater visibility in the shallows above the wreck can be quite good, the silty seabed can be stirred up as the tide runs over the seabed, and it is common to find that down on the wreck the particles in suspension filter out all light coming down from above. As a result, there is little or no ambient light – the wreck usually has the feeling of being very dark and moody. Divers are reliant on their torches, the rusty red brown metal of the ship being covered in the soft coral known as dead men’s fingers, which flares white in the torch beams.

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