First class divers could work 300 ft (91 m) depths while salvage and second class divers were qualified down to 150 ft (46 m).
Can you dive to the Titanic?
You cannot scuba dive to the Titanic due to its depth at 12,500 feet. Air consumption: one standard tank lasts 15 minutes at 120 feet. Supply for 12,500 feet would be impossible to carry even with a team. The deepest dive on record with special equipment, training and a support team is 1,100 feet.