[Tainan]

Yeah, and Britain was once an important naval power.
As was Spain.
As was Portugal.
As were quite a few others.
Meh...history is littered with the remains of “Once Great Naval Powers.”

It don’t mean nothin’.

[Tonytitan]

It don’t mean nothin’.

Exactly. It can't be that massive if it can't homeport a Nimitz-class carrier.

[BroJoeK]

Tainan: "history is littered with the remains of 'Once Great Naval Powers.' "

I'll take that challenge:
In addition to your aforementioned Britain, Spain & Portugal, names which come to mind include:

1. Holland
2. Denmark
3. Sweden
4. France
5. Venice
6. Ottoman's
7. Vikings
8. Byzantines
9. Romans
10. Carthaginians
11. Greeks
12. Phoenicicans
13. Mycenaeans
14. Minoans
15. and of course, China, on occasion
16. not to mention the amazing seafaring Polynesians.

By sheer coincidence (I'm certain), the peak of each nation's relative naval power also happened to correspond to the peak of their economic & cultural dominance.
Indeed, when each lost one, as it happened, they also lost the others.

Minoans on Santorini, circa 1,700 BC: