Edward L. Beach, Rich Richardson Series, Bk 3, RDC-M, #4, 1979, 7/86. A novel set 15 years after the end of WWII as the US Navy converts its subs to nuclear-powered ships. The USS Cushing is on a secret mission to determine whether her missiles are effective when fired from beneath the ice...but a Russian sub is lurking in the vicinity. Very good.