a name for a scuba diver , often for a rebreather -equipped diver on an covert attack or reconnaissance mission

a scuba diver , usually a rebreather -equipped diver on an covert attack or reconnaissance mission, as distinct from armed forces work divers and civilian divers

Frogman is a popular term for a scuba diver. The word arose around 1940 from the appearance of a diver in shiny wetsuit and with large fins on his feet. The term preferred by scuba users is 'diver', but the word "frogman" persists in usage by non-divers, especially in the media, often to refer to professional scuba divers in organizations such as the police.

someone who works underwater