Impervious
10 ship citations (1 free) in 9 resources
Impervious
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Impervious (1952/6)
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Impervious (AM 245)
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Impervious (MSO 449)
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Impervious (Recreational; New York, NY; built 1986; 10 gross tons)
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Impervious (Recreational; Washington, DC; built 1995; 95 gross tons; call sign WDA6491)
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Impervious (U.S.A.)
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Impervious, USS (MSO 449)
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