一名深海潜水员发现了一艘沉船。

A deep-sea ___diver discovered a shipwreck.

他获得了开放水域潜水员的资格。

He obtained the qualification of an open water ___diver.

潜水员穿着潜水服，戴着氧气罐。

The ___diver wore a wetsuit and oxygen tank.