When Todd joins his captain father aboard an atomic tugboat that is towing five antarctic icebergs to California where a drought has created a desperate need for drinking water, he keeps up with his schoolwork via a computer and the same simulated teacher he talks to on the screen back home. As a supplement there are VIOL pilot Bert's running explanations of such matters as how cables are attached to the bergs and why the ice doesn't melt in the warmer waters. Then comes a violent storm, one berg is lost and the others threatened, and Todd ends up doing his bit on the crisis-packed but successful ship-to-ice copter missions that cut the rear berg loose and save the others. It's 100% above the surface. . . let it drift by.