No 2,in reality, is still probably the Royal Navy. 4 pocket carriers (25,000tonnes), 30 frigate/destroyers, 16 nuc. subs and loads of support ships and ofcourse they have the Royal Marines. The Brits have a diverse fleet, and suposedly the best training in the world.
Ask any US Navy Admiral - they would probably agree.
The JMSDF - all the gear but no idea as they say
