At the moment planes in the lists are not guaranteed to always have a sensible ETA - it should be set as part of AddList functions, and lists should only be accessed this way. (FAIRLY MAJOR).
*******************************************/
-FGTower::FGTower() {
+FGTower::FGTower() :
+ separateGround(true),
+ ground(0)
+{
ATCmgr = globals->get_ATC_mgr();
_type = TOWER;