He climbed 'aboard' just as the train was leaving.
Everyone 'aboard' was injured in the accident.
She got 'aboard' [='on board'] the train.
(..) OLSEN : Topside, come in. JOHN: Outbound enemy aircraft. I'm in pursuit. There's human prisoners aboard that thing. Get after it! OLSEN : Data transfer complete. Connor, we're joining you topsi-- JOHN: Olsen. (..)2009 Terminator Salvation