US submarine classes after 1945
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Nuclear-powered ballistic missile submarines - SSBN | |
Nuclear-powered cruise missile submarines - SSGN | |
Nuclear-powered attack submarines - SSN | |
Conventional-powered cruise missile submarines - SSG | |
Conventional-powered attack submarines - SS or SSK | |
Radar picket submarines - SSR or SSRN | |
Auxiliary submarines - AGSS or SSA | |