The Soviet Union started frogman operations during World War II. The first unit of combat divers (or RON team), was formed in Leningrad in 1941. Soviet combat divers were quite successful during World War Two. They performed a variety of missions numbering well over 200 operations. 1970 and after: frogmen from the OB PDSS operated in Angola, Vietnam, Egypt, Mozambique, Nicaragua, Ethiopia and other places, often at the request of the nation that they operated in. They went to Angola and Nicaragu

UNDERWATER TRAINING: Our helicopter crews go through intense training several times a year to ensure they are ready and skilled for anything. At Toll Ambulance Rescue’s purpose-built, state-of-the-art Aeromedical Crewing Excellence Training Centre in Bankstown, part of their training involves sitting in a helicopter-like pod which plunges into a pool and then overturns. Participants are blindfolded for the exercise and some exits are blocked. It's not for the faint-hearted. Thanks to 9 News Sydn

SAILOR FOR A DAY PART 4: Underwater Survival Training is critical for sailors in case they crash into the water! I learn the basics including "drown-proofing" and get to fly in a Navy Seahawk! | Wendi Lane