USS Niagara (SP-136)
| History | |
|---|---|
| United States | |
| Name | USS Niagara | 
| Namesake | Fort Niagara | 
| Owner | Howard Gould | 
| Port of registry | New York | 
| Builder | Harlan and Hollingsworth, Wilmington, DE | 
| Completed | 1898 | 
| Acquired | 10 August 1917 | 
| Commissioned | 16 April 1918 | 
| Decommissioned | 3 March 1931 | 
| Stricken | 10 December 1931 | 
| Fate | Sold for scrapping 13 September 1933 | 
| Notes | Reclassified PY-9 17 July 1920 | 
| General characteristics | |
| Type | armed yacht | 
| Tonnage | 1,444 GRT, 703 NRT | 
| Displacement | 2,690 tons | 
| Length | 
  | 
| Beam | 36.0 ft (11.0 m) | 
| Draft | 17 ft 0 in (5.18 m) | 
| Depth | 19.4 ft (5.9 m) | 
| Installed power | 530 NHP | 
| Propulsion | 
  | 
| Speed | 12 knots (22 km/h) | 
| Complement | 195 | 
| Armament | 
  | 
The sixth USS Niagara (SP-136), later PY-9, was a United States Navy patrol vessel in commission from 1918 to 1931 and which served during World War I.