noun
embarkation
em-bar-KAY-shun/ˌembɑːrˈkeɪʃn/
Boarding a ship or aircraft to begin a journey.
Passengers gather at the pier for embarkation on the cruise ship.

Etymology
The pieces describe the act of getting into a ship. Originally used for putting or going aboard a vessel, embarkation now also covers boarding aircraft and other vehicles.
In context
what I do on embarkation day to start the cruise fully prepared. Follow these tips and you’ll hit the ground running and make the most of your first day on board.
More examples
- Embarkation begins at noon, so keep your passport handy.
- The airline delays embarkation while workers inspect the plane.
- Crew members assist passengers during embarkation.
Forms
embarkation · embarkations
embark verb — To board a ship or aircraft.