https://www.history.uscg.mil/browse-by-topic/Aviation/Article/3051573/curtiss-hs-2l-flying-boat/
Curtiss HS-2L Flying Boat United States Coast Guard Air
Curtiss HS-2L Flying-Boat Manufacturer Curtiss Designation HS-2L Other Designations, if any: H-14 (factory designation); HS-1L; HS-3L; Aircraft Type Patrol...
united states coast guardcurtiss hsflying boatair