HRS

E2237771 UNEXPLORED

HRS is the U.S. Navy and Marine Corps military designation for the Sikorsky S-55 series of utility helicopters used primarily during the early Cold War era.

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All labels observed (1)

Label	Occurrences
HRS canonical	1

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Sikorsky S-55 → militaryDesignation → HRS ⓘ