K VIII-class submarine
{{Use dmy dates|date=April 2022}}
| {{Infobox ship begin}}
{{Infobox ship image |Ship image=File:COLLECTIE TROPENMUSEUM Onderzeeboot K X Soerabaja TMnr 10002148.jpg |Ship caption=Dutch submarine K X, in Surabaya, Dutch East Indies }} {{Infobox ship class overview |Name=K VIII class |Builders=Koninklijke Maatschappij De Schelde, Vlissingen, Netherlands |Operators=*{{Navy|Netherlands}}
|Class before={{sclass|K V|submarine|4}} |Class after={{sclass|K XI|submarine|4}} |Subclasses= |Cost= |Built range= 1917{{ndash}}1923 |In service range= |In commission range= 1922{{ndash}}1944 |Total ships building= |Total ships planned= |Total ships completed=3 |Total ships cancelled= |Total ships active= |Total ships laid up= |Total ships lost= |Total ships retired=3 |Total ships preserved= }} {{Infobox ship characteristics |Hide header= |Header caption= |Ship type=Patrol submarine |Ship tonnage= |Ship displacement=*Surfaced:
|Ship length= {{Convert|64.41|m|ftin|abbr=on}} |Ship beam= {{Convert|5.6|m|ftin|abbr=on}} |Ship height= |Ship draught= {{Convert|3.55|m|ftin|abbr=on}} |Ship depth= |Ship hold depth= |Ship decks= |Ship power= |Ship propulsion=*K VIII
|Ship speed=*K VIII
|Ship range=*{{Convert|3500|nmi|km|abbr=on|lk=in}} at {{Convert|11|kn|km/h|abbr=on}} surfaced
|Ship endurance= |Ship test depth={{Convert|50|m|abbr=on}} |Ship complement=31 |Ship time to activate= |Ship sensors= |Ship EW= |Ship armament=*4 × {{Convert|450|mm|in|1|abbr=on}} torpedo tubes (2 bow, 2 stern)
|Ship armour= |Ship notes= }} |
The K VIII-class submarine was a three boat class of submarines of the Koninklijke Marine (Royal Netherlands Navy). The class varied from {{sclass|K V|submarine|1}} due to the removal of two external torpedo tubes, which were removed to reduce the boats' vulnerability to depth charging. The boat had a diving depth of {{convert|50|m}}. K VIII-class submarine was built after the John Philip Holland design. [https://naval-encyclopedia.com/ww2/netherlands/dutch-submarines.php K VIII-class submarine, naval-encyclopedia.com]
All ships were still in service at the start of World War II. During the war K IX was transferred to the Royal Australian Navy and renamed K9.[https://web.archive.org/web/20120404023159/http://www.dutchsubmarines.com/classes/class_kviii.htm Description of class]
Boats
| class="wikitable" | ||
| width="120" | Name
! width="120" | Laid down ! width="120" | Launched ! width="210" | Commissioned ! width="210" | Decommissioned | ||
|---|---|---|
| {{HNLMS|K VIII | 2}}
| 31 October 1917 | 28 March 1922 | 15 September 1922 | 15 July 1942 | |
| {{HNLMS|K IX | 2}} Renamed: {{HMAS|K9 | 6}}
| 1 March 1919 | 23 December 1922 | 21 June 1923 (Dutch navy) | 15 July 1942 (Dutch navy) |
| {{HNLMS|K X | 2}}
| 1 November 1919 | 2 May 1923 | 24 September 1923 | 2 March 1942 |