People are simply complicating rankings here. All these heavy words - "contextual" 'metric tonnage', "P5".
Chodo woh sab.
Take a certain fleet, say the "Destroyer fleet" and compare it with whichever Navy u wanna compare.
Some people are bringing in Uk here, so lets just compare the Destroyer fleet of both.
12 Destroyers equipped with BrahMos, Heavy Torpedo tubes, 7 of them with AESA and Cooperative Engagement Capabilities.
VS
6 Destroyers, with no Anti ship missiles on them , no torpedo tubes, and most of them anyway lying under refit due to propulsion issues.
Similarly do so with other parts of the Navy - The Carrier fleet, Frigate, Corvette, Submarine, etc and come to a conclusion.
Just because certain Navies have SSBNs/SSNs does not automatically make them better, or even in the comparative league. If that was the only criteria, i guess all navies around the world are stupid to invest Billions in Carriers, Destroyers, Frigates, etc, etc. Just put 15 Bil$ for Nuke subs and u would have them pretty quick. Doesn work like that though.