In Hillys, next to the Black Isle, There are two red boats sailing
around. on the back of each boat is a big box. If you shoot the box with
the hovercraft it should explode and then crystals come out the back of
the boat. Pick up the crystals and there's the units. then go to the
main canal and as soon as you get there turn around and go back. The
boxes should have appeared again. NOTE: best to aim canon that blows up
the guard at the factory entrance to get box. If you don't the cops
might come.