- References Notes Print
{{Infobox ship image| Ship image=Sor.jpg | Ship caption=Sjöormen in 1968.
}}{{Infobox ship career | Hide header= | Ship country= Sweden | Sweden|naval}} | Ship name= Sjöormen | Ship namesake | Ship ordered= | Ship builder=Kockums | Ship laid down= 1966 | Ship launched= 25 January 1967 | Ship acquired= | Ship commissioned= 31 July 1968 | Ship decommissioned= 1997 | Ship in service= | Ship out of service= | Ship struck= | Ship reinstated= | Ship homeport= | Ship motto= Esse non videre ("To be without being seen") (1967–1994)[1] | Ship nickname= | Ship honours= | Ship fate= Sold to Singapore in 1997 | Ship status= | Ship notes=
}}{{Infobox ship career | Hide header=title | Ship country= Singapore | Singapore|naval}} | Ship name= RSS Centurion | Ship acquired= 28 May 1999 | Ship commissioned=26 June 2004 | Ship decommissioned= | Ship struck= | Ship renamed= | Ship reclassified= | Ship homeport= | Ship fate= | Ship status= Active | Ship notes=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Sjöormen|submarine|3}} | 1130|t|LT|0|abbr=on}} surfaced- {{convert|1210|t|LT|0|abbr=on}} submerged
| 50.5|m|ftin|abbr=on}} | 6.1|m|ftin|abbr=on}} | Ship height= | 5.8|m|ftin|abbr=on}} | Ship depth= | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship power= | Ship propulsion=*2 × Hedemora Diesel generators- 1 × electric motor
- 1 shaft
| 20|kn|mph km/h|lk=in}} | Ship range= | Ship endurance= | Ship test depth= | Ship complement=25 officers and enlisted | Ship time to activate= | Ship sensors= | Ship EW= | 533|mm|in|0|abbr=on}} torpedo tubes)- 2 × ({{convert|400|mm|in|0|abbr=on}} torpedo tubes)
| Ship armour= | Ship notes=
}} | HSwMS Sjöormen (Sor), Sw. meaning sea serpent, was the lead ship in the Swedish submarine class Sjöormen, project name A11. The planning of the ships included a number of different AIP-solutions including nuclear propulsion, however the ships where finally completed with for the time extremely large batteries. The ship was a single hull submarine, with hull shape influenced by the American experimental submarine {{USS|Albacore|AGSS-569}}. The hulls was covered with rubber tiles to reduce the acoustic signature (Anechoic tiles), at this time a pioneer technology. The Sjöormen-class was also the first in the world to use a cross-rudder. The submarine served in the Swedish Navy for almost 30 years and was then after upgrades sold to Singapore in 1997 together with its four sister ships. ReferencesNotes1. ^{{cite book |url=http://www.forsvarsmakten.se/siteassets/4-om-myndigheten/dokumentfiler/handbocker/h-parad-6-2017.pdf |title=Handbok: parad 6: traditionsvård : H PARAD 6 2016 |year=2017 |publisher=Försvarsmakten |location=Stockholm |language=Swedish |id={{LIBRIS|22459606}} |page=54}}
Print- {{cite book |last=Granholm |first=Fredrik |title=Från Hajen till Södermanland: svenska ubåtar under 100 år |trans-title=From Hajen to Södermanland: Swedish submarines during 100 years |series=Marinlitteraturföreningen, 0348-2405 ; 89Forum navales skriftserie, 1650-1837 ; 7 |year=2003 |publisher=Marinlitteraturfören. |location=Stockholm |language=Swedish |isbn=91-85944-40-8 |id={{LIBRIS|9212796}} |page=}}
{{Sjöormen class submarine}}{{DEFAULTSORT:Sjoormen (Sor)}}{{Sweden-stub}}{{submarine-stub}} 5 : Sjöormen-class submarines|Ships built in Malmö|1967 ships|Challenger-class submarines|Active submarines of Singapore |