航こう跡せき

noun

wake; track left by a ship or aircraft

Refers to the visible trail or path left behind by a vessel or aircraft moving through water or air.

• 船ふねの航こう跡せきが海かい面めんに白しろく残のこっていた。

  The ship's wake remained white on the sea surface.

noun

flight path; track of an aircraft

Used for the recorded or observed route of an aircraft, often in technical or navigational contexts.