[3] Inter-Island operated four S-43's to ferry Pan Am Clipper passengers and local residents from Honolulu throughout the Hawaiian Islands.

[4] Reeve Aleutian Airways owned two S-43s during the 1950s, one operational (N53294 purchased 1948 and trade for G-21 in 1957) and one for spares (fuselage at Alaska Aviation Heritage Museum).

[5] The U.S. Army Air Corps acquired five aircraft in 1937 under the designation OA-8 for transport of freight and passengers.

[8] Two aircraft went to private owners: William Kissam Vanderbilt II and Howard Hughes.

[needs update] A Sikorsky JRS-1 is displayed at the Smithsonian National Air & Space Museum's Steven F. Udvar-Hazy Center in Virginia, in an unrestored state.

[10] Data from ,[17] American flying boats and amphibious aircraft : an illustrated history[18]General characteristics Performance