h2) The Canyon and the Blue Hole are the two sites that have made Dahab infamous for deaths of divers exceeding their limits. When dived properly and when staying within recreational limits, within 32 metres, there is no problem. The recent introduction of Technical Diving facilities should improve the survival rate of those drawn to the Arch at the Blue Hole. Because the arch is at 55m, a number of divers have suffered decompression illness or death, from attempting this single tanks. Similar problems at the Canyon, where dives below 50 metres, through the Canyon, attracted many daredevil divers, who did not return. This photo shows some plaques dedicated to some of those who died here. The small one on the right is blank...hmmmm. I don't know the exact number but about 250+ deaths. Ali tells us he has gone through the arch many times. The secret is patience and waiting for no current. Sometimes there's a current which will take you down further and faster than you expect. Other times the current is against you and you use up oxygen struggling to get down. Since he lives there, he will turn back when he feels there is a current present. However, visitors don't turn back because they cannot return, this is there only chance, so they go for it.