1.1 Production should run parallel to Virginia class submarine construction at two per year 1.2 Upgrades to Los Angeles class submarines were scheduled to be completed by end of 2020 but were likely delayed by 6-12 months due to impact of COVID-19 on shipyard workforces 1.3 Could be installed on the future Columbia class (replaces Ohio class) 1.4 No procurement expected outside the United States.
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