Pask film no. 2.

Intertitle explains that these experiments take place in water with 3% salinity with wave movement. The first test is on an anaesthetised subject wearing RAF battle dress, winter clothing and an RAF Mae West life jacket. The subject is never fully submerged, although the waves lap over his face. The self-righting properties are shown. These sequences are repeated in slow motion. A proposed amendment to the Mae West jacket is shown; the subject's face is now consistently above water. This sequence is also repeated in slow motion. The next sequences feature a US-modified Mae West life jacket, Canadian Pressure Waistcoat. The tests proceed as before in real time and slow motion.