adjective
naval
NAY-vuhl/ˈneɪvl/
Relating to a navy or its warships.
The sailors stand on the naval vessel’s deck.

Etymology
The pieces mean “pertaining to ships.” The more specific navy sense applies that broad ship connection to a nation’s organized sea force.
In context
modern navy and that's a force that would grow into one of the most dominant military forces in history. This is the beginning of a centuries long story of British naval excellence.