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K-Class Navy Blimp Image Source: U.S. Navy Photo // Collection of Mark Lutz

Moored to a mobile mast, this U.S. Navy K-class airship is being cooled down by a spray of water (top-left). This procedure was frequently used to control the buoyancy and envelope pressure of blimps in warm weather. This photo was likely taken at NAS Richmond, in 1942

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