the.com/diving helmet
A copper bubble that lets you walk on the seafloor like an astronaut who took a wrong turn.
Brass weightOften over 50 pounds, useless above water
Air supplyHand-pumped from the surface via hose
Deadly silenceCut the hose, and you suffocate slowly
Twelve boltsStandard model bolted to the dress suit
Squeeze dangerPressure loss could crush a diver inward