source: Anime/Manga Discussion Thread - Off-Topic - World of Tanks official forum - Page 529

of, in, or relating to a navy or navies:

〖名詞の前で〗海軍の(→ military); 軍艦の; 海軍を有する

e.g. a naval officer

e.g. naval operations.

late Middle English: from Latin navalis, from navis ‘ship’.