Helicopter Underwater Escape Training

Helicopter Underwater Egress Training (also known as Helicopter Underwater Escape Training, and Rotary-wing Underwater Egress Training in Canada; often abbreviated as HUET (RUET) is training provided to helicopter flight crews, offshore oil and gas industry, law enforcement personnel, and military personnel who are regularly transported by helicopters over water. As the name implies, the purpose of this training is to prepare passengers and crew for an emergency evacuation or egress in the event of a crash landing on water.

Source: Wikipedia — Helicopter Underwater Escape Training (CC BY-SA 4.0)