Definitions for "Underway"
Keywords:  aground, moored, anchor, shore, afoot
Making progress through the water; not at anchor, aground, or made fast to the shore
currently in progress; "there is mischief afoot"; "plans are afoot"; "preparations for the trial are underway"
The condition of a vessel not at anchor and not made fast to the shoe or aground.
Keywords:  alas, trip, begun
The trip, alas, has begun.
Keywords:  anchorage, pier, ship, motion, once
A ship in motion. Once your ship has left the pier or its anchorage, the ship is considered "underway."
When the ship is about to depart
Keywords:  sail, motor, moving, power, act
The act of sailing
moving under power of sail or motor.
Keywords:  last, moving
Moving, at last.