HO4S
E2237770
UNEXPLORED
The HO4S is a U.S. Navy and Coast Guard variant of the Sikorsky S-55 helicopter used primarily for utility, search and rescue, and transport missions during the early Cold War era.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HO4S canonical | 1 |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.