Editing James Madison-class submarine (section)

{{Short description|United States Navy class of fleet ballistic missile submarines}}
{{Use dmy dates|date=April 2022}}
{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=USS John C. Calhoun (SSBN-630).jpg
|Ship caption= USS ''John C. Calhoun'' (SSBN-630) entering [[Holy Loch]], [[Scotland]] on completion of the thousandth Polaris [[nuclear deterrent]] patrol, 18 May 1972.
|image alt=Angled view of gray submarine in river steaming towards camera. Personnel wearing high-visibility apparel are standing atop the submarine, while a tugboat spraying water is visible at the submarine's starboard side.
}}
{{Infobox ship class overview
|Builders=*[[General Dynamics Electric Boat]]<ref Name=FAS/>
*[[Mare Island Naval Shipyard]]<ref Name=FAS/>
*[[Portsmouth Naval Shipyard]]<ref Name=FAS/>
*[[Newport News Shipbuilding and Drydock Company]]<ref Name=FAS>[https://fas.org/programs/ssp/man/uswpns/navy/submarines/ssbn616_lafayette.html "SSBN-616 Lafayette-Class FBM Submarines" from the FAS] {{webarchive|url=https://web.archive.org/web/20121023233739/http://www.fas.org/programs/ssp/man/uswpns/navy/submarines/ssbn616_lafayette.html |date=23 October 2012 }}</ref>
|Operators= {{naval|United States}}
|Class before={{sclass|Lafayette|submarine|4}}
|Class after={{sclass|Benjamin Franklin|submarine|4}}
|Subclasses=
|Built range=1962–1964
|In commission range=1964–1995
|Total ships building=
|Total ships planned=
|Total ships completed=10
|Total ships cancelled=
|Total ships active=
|Total ships laid up=
|Total ships lost=
|Total ships retired=10
|Total ships preserved=1 (as training vessel)
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship type=[[Nuclear submarine|Nuclear-powered]] [[ballistic missile submarine]]
|Ship displacement=Surfaced: {{convert|7325|LT|t|0|lk=in|abbr=on}}
Submerged: {{convert|8251|LT|t|0|lk=in|abbr=on}}<ref name="FriedmanSubs1">{{cite book | last = Friedman | first = Norman | title = U.S. Submarines Since 1945: An Illustrated Design History | publisher = [[United States Naval Institute]] | year = 1994 | location = [[Annapolis, Maryland]] | pages = 199–203, 244 | isbn = 1-55750-260-9 }}</ref>
|Ship length=  {{convert|425|ft|m|abbr=on}}
|Ship beam= {{convert|33|ft|m|abbr=on}}
|Ship draft= {{convert|28|ft|6|in|m|abbr=on}}
|Ship propulsion=*1 × [[S5W]] [[Pressurized water reactor|PWR]]<ref Name=FAS/>
*2 geared [[steam turbine]]s ({{convert|15000|shp|abbr=on}}),
*1 shaft<ref name="FriedmanSubs1"/>
|Ship speed=*{{convert|16|kn|km/h}} surfaced
*{{convert|21|kn|km/h}} submerged<ref name="FriedmanSubs1"/>
|Ship range=
|Ship endurance=
|Ship test depth={{convert|1300|ft|m}}<ref name="FriedmanSubs1"/>
|Ship complement=Two crews of 14 officers and 126 enlisted<ref name="FriedmanSubs1"/>
|Ship sensors=
|Ship EW=
|Ship armament=16 [[Polaris missile|Polaris A3]] or [[UGM-73 Poseidon|Poseidon C3]] or [[UGM-96 Trident I|Trident I C4 missile]]s, 4 × [[American 21-inch torpedo|21-inch (533 mm)]] [[torpedo tube]]s, 12 [[torpedo]]es<ref name="FriedmanSubs1"/>
|Ship notes=
}}
|}

The '''''James Madison'' class''' of submarine was an evolutionary development from the {{sclass|Lafayette|submarine|4}} of fleet [[ballistic missile submarine]]. They were identical to the ''Lafayette''s except for being initially designed to carry the [[Polaris A-3 missile]] instead of the earlier A-2. This class, together with the {{sclass|George Washington|submarine|5}}, {{sclass|Ethan Allen|submarine|5}}, ''Lafayette'', and {{sclass|Benjamin Franklin|submarine|5}} classes, composed the "[[41 for Freedom]]" that was the Navy's primary contribution to the [[nuclear deterrent]] force through the late 1980s. This class and the ''Benjamin Franklin'' class are combined with the ''Lafayette''s in some references.