embarkation

US /ˌem.bɑːrˈkeɪ.ʃən/
UK /ˌem.bɑːrˈkeɪ.ʃən/
"embarkation" picture
1.

the act of boarding a ship, aircraft, or other vehicle for a journey

:
Passengers should proceed to the embarkation gate.
The embarkation process was smooth and efficient.