The method 1, further comprising calculating a ground range d1 to a nearest point that makes the angle of {HEAD ~ entry} into {TAIL ~ the landing runway} ψ zero at a current location using Equation 5: 
into
The method 1 , further comprising calculating a ground range d1 to a nearest point that makes the angle of { HEAD ~ entry } into { TAIL ~ the landing runway } ψ zero at a current location using Equation 5 :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH