I am delighted to have you on board.
- Me alegro de teneros a bordo.
When must I go on board?
- ¿A qué hora debo estar a bordo?
I feel as if I were aboard a great ship.
- Siento como si estuviera a bordo de un gran barco.
They are now aboard the ship.
- Ellos ahora están a bordo del barco.
Please say a prayer for those who were onboard.
- Por favor diga una plegaria por aquellos que estuvieron a bordo.