The negligence was there, but ws it the Ritz who was negligent?
According to at least one account I"ve read the Ritz had a contract with a "scuba outfit". This scuba outfit droped very green divers on a reef way beyond normal depths, and dropped one of them first and alone. The "alone" diver went to the bottom as instructed, but the rest of the crew didn't show (good for the rest of the crew, bad for DM.) Ritz management was not on the dive, or to my understanding was a Ritz employee.
The alone and well stoned diver hung out for almost 20 min, then did a polaris imitation. After 4x the NDL for that depth and a rocket ascent a DCS incident was unavoidable. The fact that O2 was not on the boat is a red herring. As bad as the fellow had to be bent it would have made little or no difference to the outcome. That he even survived to the surface is the miracle of the decade.
I expect it the Ritz settled to avoid seeing a jury with no clue how diving works, not because the Ritz was negligent. Without a doubt the Ritz's CONTRACTOR was neglignet, but a native Jamacian contractor has no $s, so it sounds to me like someone did a deep pocket hunt, then legally extorted $ for the victim of someone else's error. More likely culpable targets would be the "instructor" who "taught" this fool, and the boat crew. Of course the lawyer couldn't even make his fee from THEIR pockets!
Compensation of the injured may be a desireable effect, but extortion of a questionalble target isn't the way to go about it.
FT