Onboard
Definition 1 of 3
Pro Tip 1/3
Joining Action
Often suggests you're joining others already present or moving into a vehicle. Let's go onboard and join the crew.
Pro Tip 2/3
Not for Facilities
Don't use 'onboard' to describe objects inside a vehicle, only for people or animals. The luggage is on the ship, not onboard.
Pro Tip 3/3
Transition Phase
Implies the moment of transition from not being on a vehicle to being inside it. She stepped onboard just before the doors closed.