The Gearing class destroyers entered US Navy service during WWII. Decades later one of them, USS Johnston (DD-821) took part in a unique experiment to test the feasibility of using a coal-derived synthetic liquid fuel as opposed to imported oil.

(The “late-war Gearing” layout, the template to which USS Johnston (DD-821) was built in 1945.)

(Crew patch for sailors involved in the 1973 experiment.)
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