Categories starting with R
Royal Navy (29)

Battleships (4), Battlecruisers (2), Aircraft Carriers (4), Heavy Cruisers (2), Light Cruisers (6), Destroyers (7), Submarines (4), Aircraft (0)
Regia Marina (20)

Battleships (3), Heavy Cruisers (2), Light Cruisers (6), Destroyers (3), Submarines (5), Miscellaneous (1)