What kind of ship would the Royal Navy have needed against Icelandic fishery-protection vessels during the Cod Wars?
Short answerHMS Vanguard would have been exceptionally resistant to ramming and capable of pushing the patrol vessels back.
NotesThe Cod Wars exposed how little armor postwar Royal Navy ships carried when confrontations became physical contests of hull strength. HMS Vanguard supplies a counterfactual answer: Icelandic patrol vessels could have struck the battleship repeatedly without achieving the same effect. Vanguard could also have used her size to push them back. The example connects armor to constabulary coercion and collision resistance rather than only to shellfire.