D-Wall

You drop onto the top of the wall and it falls away vertically beneath you, continuing to around 2,000 metres, far past anything a diver sees. The dived section is the top of that face, roughly 25 to 40 metres, and a medium current usually runs along it, so the dive works as a slow drift with the wall on one shoulder and open water on the other. There is nothing shallow underneath you at any point, which is what makes buoyancy control the whole job here.

Work the face and it becomes a macro dive: sea fans growing out from the wall hold pygmy seahorses, and frogfish sit along the same stretch, both of which need a slow pass and a careful eye rather than a swim-by. Turn away from the wall and the other reason divers come is out there instead. Hundreds of schooling hammerheads have been seen off D-Wall, out in the blue rather than along the face, so it is worth breaking off the macro to look out every minute or two.

At around 40 metres the wall breaks before continuing down, and that ledge is the working limit on this site: going deeper means equipment beyond recreational kit. Plan the deep part of the profile first, then let the current carry you gradually up the face, making the ascent along the wall with it as a visual reference rather than hanging out in open water.