0 someone who swims or works underwater for a long time wearing breathing equipment, flippers (= rubber or plastic shoes that are longer than the feet), and usually a rubber suit:
police frogmen
Thirdly, there is the possibility of underwater attack by a frogman or submarines.
I understand that there have been some cases of late in which frogmen have gone under the surface of the sea and removed the catch from lobster pots.
They are trained as parachutists or frogmen.
The method used was for one man to be dropped from a car, after dark, in a frogman outfit together with a rubber dinghy and a monofilament net.
On the front of the harness of the navy frogman version there is a projecting metal plate intended to carry a limpet mine.
Mesotech make underwater surveillance and advanced frogman detection sonar systems.
It is designed for use by combat frogmen, and for diving to remove naval mines which may be sensitive to sound and anything magnetic.
These operations were part of a longer series of frogman operations, see human torpedo.
