SCUBA DIVING REWARDS & RISKS You probably followed the tragedy that befell the OceanGate Expeditions Titan submersible; while attempting to visit the sunken Titanic at a depth of more than 12,000 feet it catastrophically imploded and all five persons on board were lost. Four of the five occupants spent $250,000 each to get close to the wreck of the Titanic. Most of us would never consider taking part in such a dive—if for no other reason than the extreme expense. And now you may not want to attempt any sort of underwater dive, even scuba diving. Although scuba has some...