- References
{{otherships|USS Porpoise}}{{Infobox ship image| Ship image= | Ship caption=
}}{{Infobox Ship Career | Hide header= | Ship country=United States | 1917}} | Ship name=USS Porpoise | Ship namesake=The porpoise, any of several small gregarious toothed whales (genus Phocoena) | Ship owner= | Ship operator= | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder= | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched= | Ship sponsor= | Ship christened= | Ship completed= | Ship acquired= | Ship commissioned= | Ship decommissioned= | Ship recommissioned= | Ship maiden voyage= | Ship in service= | Ship out of service= | Ship renamed= | Ship reclassified= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification= | Ship motto= | Ship nickname= | Ship honours= | Ship honors= | Ship captured= | Ship fate= | Ship status= | Ship notes=No records regarding Porpoise{{'}}s construction, acquisition, naval service, or fate have been found | Ship badge=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class= | Ship type=Probably a patrol vessel | Ship tonnage= | Ship displacement= | Ship tons burthen= | Ship length= | Ship beam= | Ship height= | Ship draught= | Ship draft= | Ship depth= | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship power= | Ship propulsion= | Ship sail plan= | Ship speed= | Ship range= | Ship endurance= | Ship test depth= | Ship boats= | Ship capacity= | Ship troops= | Ship complement= | Ship crew= | Ship time to activate= | Ship sensors= | Ship EW= | Ship armament= | Ship armour= | Ship armor= | Ship aircraft= | Ship aircraft facilities= | Ship notes=No records regarding Porpoise{{'}}s characteristics and performance have been found; she probably was a motorboat or yacht
}} | USS Porpoise (SP-4) was probably a motorboat or yacht which the United States Navy at least considered for service – and may have placed in service – during World War I as a patrol vessel. Porpoise received one of the earliest section patrol numbers, indicating that she was a privately owned motorboat or yacht which the U.S. Navy during 1916 or early 1917 at least considered for World War I service as a patrol vessel. No records have been found describing Porpoise{{'}}s construction, acquisition, naval service (if any), or physical characteristics and performance; her records may have been lost or destroyed. She may have seen active naval service, although some boats which received section patrol numbers were never commissioned or, in some cases, never even acquired by the Navy, so it also is possible that the lack of records reflects a lack of naval service for Porpoise. References- NavSource Online: Section Patrol Craft (SP) and Civilian Vessels (ID) Index
{{DEFAULTSORT:Porpoise (Sp-4)}}{{US-mil-ship-stub}} 2 : Patrol vessels of the United States Navy|World War I patrol vessels of the United States |