*5.2.3. Advanced low altitude algorithm*

Advanced low altitude or ADLAT algorithm developed at the start of the digital computation age. The concept of the ADLAT algorithm is to construct a parabola where the derivative taken to give a zero slope at the peak of the climb at the desired set clearance. Computation of this algorithm processed through individual terrain points and consistently updated as the airplane approaches maximum. To solve parabolic flight path related calculations, ADLAT algorithm uses square root functions and complex formulae. **Figure 4c** shows the probable flight path developed through parabolic derivative. From **Figure 4c**, it is clear that the offset terrain path defines the set clearance. Flying over a terrain, aircraft tend to surpass the preferred set clearance because aircraft could not make direct flight direction changes and equal the offset path [4, 8, 9].
