Porpoise-class submarine (Royal Navy, 1950s)
                        
                            GPTKB entity
                        
                    
                Statements (32)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:marine | 
| gptkbp:armament | torpedo tubes | 
| gptkbp:beam | 26.5 ft | 
| gptkbp:builtIn | gptkb:United_Kingdom | 
| gptkbp:crewComplement | 68 | 
| gptkbp:decommissioned | gptkb:Royal_Navy | 
| gptkbp:designedFor | anti-submarine warfare | 
| gptkbp:displacementSubmerged | 2,030 tons | 
| gptkbp:displacementSurfaced | 1,565 tons | 
| gptkbp:introducedIn | 1950s | 
| gptkbp:length | 290 ft | 
| gptkbp:maximumSpeed | 12 knots | 
| gptkbp:maximumSpeedSubmerged | 17 knots | 
| gptkbp:notableShip | gptkb:HMS_Sealion gptkb:HMS_Walrus HMS Porpoise HMS Cachalot HMS Grampus HMS Narwhal HMS Rorqual HMS Finwhale | 
| gptkbp:numberBuilt | 8 | 
| gptkbp:operatedBy | gptkb:Royal_Navy | 
| gptkbp:precededBy | gptkb:Amphion-class_submarine | 
| gptkbp:propulsion | diesel-electric | 
| gptkbp:retired | 1980s | 
| gptkbp:successor | gptkb:marine | 
| gptkbp:type | diesel-electric submarine | 
| gptkbp:usedDuring | gptkb:Cold_War | 
| gptkbp:bfsParent | gptkb:Porpoise-class | 
| gptkbp:bfsLayer | 10 | 
| https://www.w3.org/2000/01/rdf-schema#label | Porpoise-class submarine (Royal Navy, 1950s) |