Checkpoint A. Go to ground level at the start of the level. Face the blue 
  platform used to drop down from, with the white truck on your right. Find the 
  forklift on the left, at the side of the warehouse. A bag is next to the 
  warehouse next to a closed shutter opposite that forklift.
  Checkpoint B. Enter the first green car parking garage. Defeat the guards, 
  then go to the far left rear part of the garage, where there are two white 
  trucks. Climb on to the truck to the right, then jump on the pipe, and climb 
  onto the air vent. Continue around until you are at the corner where you 
  jumped up from, but now on the other side of the vent. You cannot jump over 
  the vent because you have climbed up; you must go around.
  Checkpoint D. When reaching the outside deck of the ship, to your right is a 
  dark room. A bag is in the corner on the ground.