uán-iûnn遠洋

ocean far away from the mainland

ocean far away from the mainland; oceanic; of the open sea beyond the littoral zone

English Wiktionary, “遠洋” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E9%81%A0%E6%B4%8B · confidence: Medium (Wiktionary, Hokkien)