Igor Stropnik · vidéo

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A self-inflating life jacket's automatic and manual inflation modes are tested in open water. The presenter distinguishes a buoyancy aid — which only helps a conscious swimmer float — from a life jacket, which uses a collar to rotate an unconscious person face-up and keep the head above the surface.▶ 0:01 The self-inflating model carries a CO2 cartridge and a water-soluble capsule that dissolves on immersion to trigger automatic inflation; a separate oral tube allows manual inflation as a backup.▶ 0:18 Jumping in with the jacket already pulled inflates it before water contact and demonstrates the face-up rotation.▶ 2:09 The manual inflation test reveals the main practical difficulty: locating the oral tube quickly, especially in darkness or heavy weather.▶ 2:45 The presenter stresses practicing the manual procedure at home until it can be done blind, because fumbling for the tube in chaos at sea is the realistic failure point.▶ 2:22 The automatic mechanism works as designed; the limiting factor is the sailor's familiarity with the manual backup.

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