*4.2.2. Military applications*

Military airplane utilizes radar altimeters to fly relatively very nearer to ground and the ocean to avoid radar detection. These radar altimeters are very much useful while targeting anti-aircraft weapons or surface-to-air missiles. Radar altimeter also used in terrain following radar. TFR allows fighter-bombers to fly at very low altitudes through radar altimeter system. In the advanced combat aircrafts, forward terrain looking radars used [6, 7].
