The AMV-7 seems to ignore amphibious waypoints set by a mission creator and instead make for closest land. This is a problem when creating beach landing missions since you get Marshall tanks going all over the place. Also, while they seem to seek closest land, they don't do so with regard to their ability to climb up onto the land. In the Agia harbor, AMV-7s will move to the rocky breakwater and try to climb it- which they can't- making themselves really easy targets for any OPFOR on land (assuming their aim isn't off from laughing so hard).

So what you get is a crowd of AMV-7s going every which way, getting stuck against each other, rocks, high underwater terrain, and trying to climb unclimbable obstacles, all instead of following the player waypoint. This *usually* happens if you place the AMVs any distance from the beach. Out of several tries I did have the vehicle path fairly close to the correct waypoint, but usually it chooses its own path.