Yes you can use the pos()-methods of Actors
example (Shows coordinates of a plane after a player entered it):
Code:
public override void OnPlaceEnter(Player player, AiActor actor, int placeIndex)
{
base.OnPlaceEnter(player, actor, placeIndex);
GamePlay.gpLogServer(null, "Plane entered at X:{0} y:{1}", new object[] { actor.Pos().x, actor.Pos().y });
}