noun, noun which may take the genitive case particle 'no'
sailing east; eastbound
Refers to ships or flights heading east. Often used in navigation, shipping, or travel contexts.
その船は東航の途中で嵐に遭った。
The ship encountered a storm while sailing east.
東航便は追い風で早く到着した。
The eastbound flight arrived early thanks to a tailwind.
Compound of 東 (east) and 航 (sailing/navigation). The exact historical derivation is uncertain, but the kanji combination directly conveys the meaning.