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SSBN-616拉斐特级FBM潜艇

该USS詹姆斯·门罗（SSBN-622）于1968年1月9日成为第一艘潜艇北极星A2的进入大修和接收POLARIS A3能力。

1974年SSBN扩展改装计划（ERP）。已启动。Previously, an operational SSBN was scheduled to undergo an overhaul approximately every 7 � years, which resulted in taking it off line for almost 2 years. To increase the SSBNs at sea effectiveness, it was decided to initiate a program to accomplish some preventive/corrective maintenance (mini-overhaul) on SSBNs at its normal refit site. This was done by extending a normal 32-day refit/upkeep between patrols to provide a 60-day extended refit period. This was to be conducted at 4-year and 7 � year intervals after initial deployment or overhaul of a SSBN. The time between overhauls was then extended to 10 years versus the 7 � years. The first SSBN to undergo ERP was the USS James Madison (SSBN-627); the ERP was conducted at the Holy Loch, Scotland, tender refit site in September- November 1974.

洛克希德在十一月开始三叉戟I（C4）计划的1973年确立为1979年的第一个新的俄亥俄级潜艇被授权在1974年的导弹的IOC日期，但将无法使用，直到1979年，因此海军决定借用从扩展改装计划（ERP）的书，C 3至C4 SSBN“backfit”节目页是在1976年中期五艘额外629,630发起，和634进行了“堤岸backfit”，而其他三艘SSBN（627，632和633）在其正常调度的第二船厂大修中backfitted。

来源和资源

• 核潜艇主页

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