naval strength; naval power
Refers to the military power or capability of a navy, often in geopolitical or strategic contexts.
その国は海軍力の増強を進めている。
That country is strengthening its naval power.
軍事力 is broader, meaning 'military power' in general, while 海軍力 specifically refers to naval strength.
Compound of 海軍 (navy) and 力 (power, strength).