impregnable

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References in periodicals archive ?
I believe he served on HMS Watchman, HMS Impregnable and others.
A naval squadron including HMS Queen Charlotte, HMS Impregnable and five Dutch frigates had to destroy the Algerian fleet to get them to stop their trade in European Christians
A REMINDER to ex-servicemen who served in HMS Impregnable or Drake that your association reunion will be held in Plymouth from Friday until Sunday.