(With Dive Team:)
Place dive team 10 units underwater. Place a waypoint on solid coastline. Observe what happens when they partially "break" the surface.
(With Infantry:)
Place Infantry on boat. Place "move" waypoint as close to coast as possible (yet still in water). Place "get out" waypoint on definite solid ground of coast. Infantry should disembark boat at the "move" waypoint, and move on foot to "get out" waypoint. Units should begin wandering in circles, with zero forward motion.