Simple, top attack ATGMs, many of which are still optically
guided, simply fly a few meters above the aim point... I'm sure if
you are aiming from different heights then the malaysian MBT
through, you have to compensate your aim accordingly...
However, more advanced ATGMs like the Javelin are fire and forget,
you just pop off a round and bug out. This ATGM can have multiple
flight attack profiles that you can select before attacking, direct
fire to take out bunkers, or top attack, of which the Javelin will
actually fly in an arc and home down onto the roof of the target,
firing it's 8.4 kg tandem HEAT warhead capable of defeating 600mm
of armor straight into the top thin armor of the PT-91. At a range
of up to 2,500 meters and with the ability to fire and forget,
those malaysians will not know what hit them...