Aboard

adv.
  1. On board; into or within a ship or boat; hence, into or within a railway car.
  2. Alongside; as, close aboard.
  3. To fall aboard of ,
    to strike a ship's side; to fall foul of.
    To haul the tacks aboard ,
    to set the courses.
    To keep the land aboard ,
    to hug the shore.
    To lay (a ship) aboard ,
    to place one's own ship close alongside of (a ship) for fighting.

prep.
  1. On board of; as, to go aboard a ship.
  2. Across; athwart.