The Giannis D was a Greek-owned cargo ship that struck the northwest corner of Abu Nahas reef in April 1983 while carrying a load of softwood timber. She did not sink at once. The hull worked against the reef for weeks before breaking apart, and today she lies in three sections with the midship largely collapsed and the bow and stern still recognisable.

The stern is the reason divers come. It sits canted at a steep angle on the sand at around 27m, which gives the whole structure a disorienting tilt, and the masts, davits and superstructure are intact enough to be unmistakable. The engine room is open and large, a popular and relatively forgiving penetration for divers with the right training, and the whole wreck is dressed in glassfish, soft coral and the schooling fish that have made it home.

She is the most preserved and most photographed of the Abu Nahas four. Depth is moderate, the structure is easy to read, and the tilt makes for striking images. Penetration is for trained divers only, and the engine room should never be entered without a guide and a plan.