Editing Ethan Allen-class submarine (section)

==Design==
Rather than being designed as {{sclass|Skipjack|submarine|0}} attack submarines with a missile compartment added, the ''Ethan Allen''s were the first submarines designed "from the keel up" as [[Ballistic missile submarine|Fleet Ballistic Missile (FBM)]] submarines carrying the [[UGM-27 Polaris|Polaris A-2 missile]]. They were functionally similar to the ''George Washington''s, but longer and more streamlined and with torpedo tubes reduced to four. In the early and mid-1970s, they were upgraded to Polaris A3s.  Because their missile tubes could not be modified to carry the larger diameter [[UGM-73 Poseidon|Poseidon]] missile,<ref name="Polmar p22">
{{Citation
 | last1=Polmar
 | first1=Norman
 | title=The Ships and Aircraft of the U.S. Fleet
 | publisher=Arms and Armour Press
 | place=London
 | edition=12th
 | year=1981
 | isbn=0-85368-397-2
 | page=22
}}</ref> they were not further upgraded.