航こう海かい天てん文もん学がく

noun

nautical astronomy

Technical field covering celestial navigation and astronomical methods used at sea.

• 航こう海かい天てん文もん学がくは、船ふねの位い置ちを知しるために星ほしを観かん測そくする学がく問もんだ。

  Nautical astronomy is the study of observing stars to determine a ship's position.