Surprise! Surprise!

Scuttlebum’s idea of ventilation is to open the nearest duct. There’s more to it than that. Ventilation systems supply fresh air and remove stale air. Have ’em under control at all times as they can be carriers of flooding water, fire and gases.

Poster No. 8 - NAVSHIPS 250-222-57
U.S. Government Printing Office: 1945 - O-656181