View source for USS H-7

{{Short description|H-class submarine of the United States}}

{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=NH-53610 USS H-7 underway, circa 1922.jpg
|Ship caption= USS ''H-7'' underway, circa 1922
}}
{{Infobox ship career
|Hide header=
|Ship country=United States
|Ship flag= {{USN flag|1922}}
|Ship name=''H-7''
|Ship namesake=
|Ship ordered=by the [[Imperial Russian Navy]], 1915
|Ship builder= [[Puget Sound Navy Yard]], [[Bremerton, Washington]]
|Ship laid down=15 May 1918
|Ship launched=17 October 1918
|Ship acquired=20 May 1918
|Ship commissioned=24 October 1918
|Ship decommissioned=23 October 1922
|Ship in service=
|Ship out of service=
|Ship struck=26 February 1931
|Ship renamed= 
|Ship reclassified=SS-150, 17 July 1920
|Ship homeport=
|Ship motto=
|Ship nickname=
|Ship honors=
|Ship fate=Sold for scrapping, 28 November 1933
|Ship notes=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship class=[[United States H-class submarine|H-class]] [[submarine]]
|Ship displacement=*{{convert|358|LT|t|abbr=on}} surfaced
*{{convert|467|LT|t|abbr=on}} submerged
|Ship length={{convert|150|ft|4|in|m|abbr=on}}
|Ship beam={{convert|15|ft|10|in|m|abbr=on}}
|Ship draft={{convert|12|ft|5|in|m|abbr=on}}
|Ship power=*{{convert|950|hp|kW|lk=in|abbr=on}} ([[diesel engine]]s)
*{{convert|340|hp|kW|abbr=on}} ([[electric motor]]s)
|Ship propulsion=*2 × [[New London Ship and Engine Company|New London Ship & Engine Co.]] diesel engines
*2 × Electro Dynamic Co. electric motors
|Ship speed=*{{convert|14|kn|lk=in|abbr=on}} surfaced
*{{convert|10.5|kn}} submerged
|Ship range=*{{convert|2300|nmi|abbr=on|lk=in}} at {{convert|11|kn}} on the surface
*{{convert|100|nmi|abbr=on}} at {{convert|5|kn}} submerged
|Ship test depth={{convert|200|ft|m|abbr=on}}
|Ship complement=25
|Ship armament=4 × [[American 18-inch torpedo|18-inch (450 mm)]] [[torpedo tube]]s
|Ship notes=
}}
|}
'''USS ''H-7'' (SS-150)''' was a [[United States H-class submarine|H-class submarine]] originally built for the [[Imperial Russian Navy]]. Six of these were not delivered pending the outcome of the [[Russian Revolution (1917)|Russian Revolution of 1917]] before being purchased by the [[United States Navy]] on 20 May 1918.

==Description==
The H-class submarines had a length of {{convert|150|ft|4|in|m|1}} [[length overall|overall]], a [[beam (nautical)|beam]] of {{convert|15|ft|10|in|m|1}} and a mean [[draft (ship)|draft]] of {{convert|12|ft|5|in|m|1}}. They [[displacement (ship)|displaced]] {{convert|358|LT|t}} on the surface and {{convert|467|LT|t}} submerged. The boats had a crew of 2 officers and 23 enlisted men. They had a diving depth of {{convert|200|ft|1}}.<ref name=f7>Friedman, p. 307</ref>

For surface running, they were powered by two [[New London Ship and Engine Company|New London Ship & Engine Co.]] {{convert|475|bhp|lk=in|0|adj=on}} [[diesel engine]]s, each driving one [[propeller shaft]]. When submerged each propeller was driven by a {{convert|170|hp|0|adj=on}} Electro Dynamic Co. [[electric motor]]. They could reach {{convert|14|kn|lk=in}} on the surface and {{convert|10.5|kn}} underwater.<ref name=f7/> On the surface, the boats had a range of {{convert|2300|nmi|lk=in}} at {{convert|11|kn}} and {{convert|100|nmi|abbr=on}} at {{convert|5|kn}} submerged.<ref name=gg9>Gardiner & Gray, p. 128</ref>

The boats were armed with four [[American 18-inch torpedo|18-inch (450 mm)]]  [[torpedo tube]]s in the bow. They carried four reloads, for a total of eight torpedoes.<ref name=gg9/>

==Construction and career==
''H-7'' was [[ship naming and launching|launched]] on 17 October 1918 and [[ship commissioning|commissioned]] on 24 October. The submarine, attached to Submarine Division 6 (SubDiv 6) and later to SubDiv 7, operated out of [[San Pedro, California]], on various battle and training exercises with the other ships of her division. She also patrolled out of San Pedro with interruptions for overhaul at [[Mare Island]]. ''H-7'' reached Norfolk on 14 September 1922, having sailed from San Pedro on 25 July, and decommissioned there on 23 October. Her name was struck from the [[Naval Vessel Register]] on 26 February 1931. She was sold for scrapping on 28 November 1933.

==Notes==
{{reflist|30em}}

==References==
* {{cite book|last=Friedman|first=Norman|title=U.S. Submarines Through 1945: An Illustrated Design History|publisher=Naval Institute Press|location=Annapolis, Maryland|year=1995|isbn=1-55750-263-3}}
* {{cite book |editor1-last=Gardiner|editor1-first=Robert|editor2-last=Gray|editor2-first=Randal|title=Conway's All the World's Fighting Ships 1906–1921|year=1985|location=Annapolis, Maryland|publisher=Naval Institute Press|isbn=0-85177-245-5|name-list-style=amp}}
*{{DANFS|http://www.history.navy.mil/research/histories/ship-histories/danfs/h/h-7.html}}

==External links==
* [https://pigboats.com/index.php?title=H-class PigBoats.COM H-class page]
*{{navsource|08/08150|USS H-7}}

{{United States H class submarine}}

{{DEFAULTSORT:H-7 (SS-150)}}
[[Category:United States H-class submarines]]
[[Category:World War I submarines of the United States]]
[[Category:Ships built in Bremerton, Washington]]
[[Category:1918 ships]]
[[Category:Russian Empire–United States relations]]