An intermediate point from which to deviate the flight path is identified based upon an analysis of the cumulative threat risk values of {HEAD ~ the grid cells}, if the threat risk value of {TAIL ~ any} of the grid cells intersecting the flight path exceeds the allowable threat risk 
An intermediate point from which to deviate the flight path is identified based upon an analysis of the cumulative threat risk values of { HEAD ~ the grid cells } , if the threat risk value of { TAIL ~ any } of the grid cells intersecting the flight path exceeds the allowable threat risk
OTH OTH OTH 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 HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH