No. 1 on the bottom-10 list of the worst jobs in science was this type of diver who swims in sewage & toxic waste
The Hazardous Waste Engineering Research Laboratory assists in providing an 
.... and Body Cooling 18-12 Worker Monitoring 18-14 Equipment List by Hazard 
... of Specialized Diver gedr 1-10 4.1 Hydro Products RCV-150, Free Swimming,
... [DOC] [TLE] The Structures and Adaptations to Marine Living - MarineBio.org [PAR] Each form of marine life has become adapted to a specific niche with a ... unless 
we use diving craft specifically designed to maintain one atmosphere.