View source for Russian submarine AG-12

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|Ship country=Russia
|Ship flag={{shipboxflag|Russian Empire|naval}}
|Ship name=''AG-12''
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|Ship builder=[[Electric Boat Company]]
|Ship original cost=
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|Ship completed=1916
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|Ship fate=Scuttled 3 April 1918
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|Ship country=Finland
|Ship flag={{shipboxflag|Finland|naval}}
|Ship name=''AG-12''
|Ship acquired=
|Ship commissioned=not commissioned
|Ship fate=Scrapped; beyond repair
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{{Infobox ship characteristics
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|Ship type=[[American Holland class submarine|AG-class]] [[submarine]]
|Ship displacement=*{{convert|355|LT}} surfaced
*{{convert|433|LT}} submerged
|Ship length={{convert|150|ft|3|in|abbr=on}}
|Ship beam={{convert|16|ft|abbr=on}}
|Ship draught={{convert|12|ft|6|in|abbr=on}}
|Ship power=2 shafts
|Ship propulsion=*2 [[diesel engine]]s ({{convert|480|bhp|abbr=on|lk=in}})
*2 [[electric motor]]s ({{convert|640|hp|abbr=on}})
|Ship speed=*{{convert|13|kn|lk=in}} (surfaced)
*{{convert|10.5|kn}} (submerged)
|Ship range=*{{convert|1750|nmi|lk=in|abbr=on}} at {{convert|7|kn}} (surfaced)
*{{convert|25|nmi|abbr=on}} at {{convert|3|kn}} (submerged)
|Ship test depth={{convert|164|ft|m}}
|Ship complement=30
|Ship armament=*4 × bow {{convert|17.9|in|adj=on|0}} [[torpedo tube]]s
*8 torpedoes
*1 × {{convert|47|mm|adj=on|sp=us}} gun

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The '''Russian submarine ''AG-12''''' was an [[American Holland-class submarine|AG-class]]  [[submarine]], designed by the American [[Holland Torpedo Boat Company]]/[[Electric Boat Company]], built for the [[Imperial Russian Navy]] during [[World War I]]. The submarine was fabricated in Canada, shipped to Russia and reassembled for service with the [[Baltic Fleet]]. She was scuttled by the Russians at [[Hanko, Finland|Hanko]] in April 1918.

Attempts were made by the Finns to salvage the vessel: She was raised in 1918 and transferred to [[Turku]] for repair, but this proved too costly and she was scrapped.

==Description==
''AG-12'' was a single-hulled submarine, with a pressure hull divided into five watertight compartments. The submarine had a length of {{convert|150|ft|3|in|m|1}} [[length overall|overall]], a [[beam (nautical)|beam]] of {{convert|16|ft|m|1}} and a [[draft (ship)|draft]] of {{convert|12|ft|6|in|m|1}}. She [[displacement (ship)|displaced]] {{convert|355|LT|t}} on the surface and {{convert|433|LT|t}} submerged. The AG-class submarines had a diving depth of {{convert|164|ft|m|1}} and a crew of 30 officers and enlisted men.<ref>Polmar & Noot, pp. 240–41</ref>

The submarine had two 3-bladed propellers, each of which was driven by a {{convert|480|hp|lk=in|adj=on}} [[diesel engine]] as well as a {{convert|640|hp|0|adj=on}} [[electric motor]]s. This arrangement gave ''AG-22'' a maximum speed of {{convert|13|kn|lk=in}} while surfaced and {{convert|10.5|kn}} submerged. She had a range of {{convert|1750|nmi|lk=in|abbr=on}} at {{convert|7|kn}} while on the surface and {{convert|25|nmi|abbr=on}} at {{convert|3|kn|abbr=on}} while submerged.<ref name=pn0>Polmar & Noot, p. 240</ref> Her fuel capacity was {{convert|16.5|LT|t}} of [[fuel oil]].<ref>Watts, p. 170</ref>

The AG-class submarines were equipped with four {{convert|18|in|adj=on|0}} [[torpedo tube]]s in the bow and carried eight torpedoes. For surface combat they had one {{convert|47|mm|adj=on|sp=us}} [[deck gun]].<ref name=pn0/>

==Construction and service==
The Holland 602 design was widely exported during World War I and the Imperial Russian Navy ordered a total of 17, in three batches, of a version known as the [[American Holland-class submarine|''American Holland''-class]] (AG in Russian for ''Amerikansky Golland'' (American Holland)). The submarines were to be built in Canada as [[knock-down kit]]s for assembly in Russia.<ref name=pn0/>

Components for the first batch of five submarines were assembled in [[Barnet, British Columbia|Barnet]], near [[Vancouver]], Canada, and shipped to [[Vladivostok]]. There they were loaded onto the [[Trans-Siberian Railroad]] and transported to [[Saint Petersburg]] where they were assembled by the [[Baltic Works]] by June 1916. During World War I Russian and [[British submarine flotilla in the Baltic|British submarines operated from bases in Finland]]. The Russian submarines of ''Holland'' type (''AG-11'', ''AG-12'', ''AG-15'' and ''AG-16'') were scuttled in the harbor of [[Hanko, Finland|Hanko]] on 3 April 1918 just prior to the German landing there.<ref>Polmar & Noot, pp. 239–40</ref> ''AG-12'' and [[Finnish submarine AG-16|''AG-16'']] seemed to be in relatively good shape and the Finns decided to salvage them. The submarine was transferred to [[Vulcan (Turku shipyard)|Ab Vulcan]] shipyard in [[Turku]] for repairs, although it proved to be hopeless, and she was soon scrapped.

==Notes==
{{Reflist|30em}}

== Bibliography ==
* ''Building Submarines for Russia in Burrard Inlet'' by W.Kaye Lamb published in ''BC Studies'' No.71 Autumn, 1986
*{{cite book|last1=Polmar|first1=Norman|last2=Noot|first2=Jurrien|title=Submarines of the Russian and Soviet Navies, 1718–1990|year=1991|publisher=Naval Institute Press|location=Annapolis, Maryland|isbn=0-87021-570-1|name-list-style=amp}}
* {{cite book|last=Watts|first=Anthony J.|title=The Imperial Russian Navy|publisher=Arms and Armour|location=London|year=1990|isbn=0-85368-912-1}}
{{United States H class submarine}}
{{April 1918 shipwrecks}}

{{DEFAULTSORT:AG-12}}
[[Category:American Holland-class submarines]]
[[Category:Ships built in Groton, Connecticut]]<!-- built in sections in the U.S. … -->
[[Category:Ships built in Russia]]<!-- …and assembled in Russia -->
[[Category:1916 ships]]
[[Category:World War I submarines of Russia]]
[[Category:Submarines of the Finnish Navy]]
[[Category:Maritime incidents in 1918]]
[[Category:Scuttled vessels]]
[[Category:Shipwrecks of Finland]]
[[Category:Shipwrecks in the Gulf of Finland]]
[[Category:World War I shipwrecks in the Baltic Sea]]