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PD 164-41 at 10,000 feet was approximately 65 knots and from a dixction of from 160 to 170 degrees and that when he Landed at Portland International Airport, he landed to the east: on runway 10 and at that time experienced surface winds of 35 knots coming from 160 degrees. He remembered these figures beause they were ~?.: near the maximum cross-wind component allowable for is aircraft. +! %, ~a't Lee nivised that he has &Hpj it -considerably b6 about the hijacking in this matter and has coné{fuded that it is b7c not realistic to assume that the hijacker survived'‘the jump. He said that in view of the very dense terrain inthe drop zone area, he can understand why the hijacker's remains have not been found. He suggested that orie way this might be facilitated would be to place identical equipment to that known to have bean in possession of the hijacker, that is, two parachutes,!' an attache case, and the known clothing on a large open field on a day of warm sunshine. Ater exposure to the rays of sun for a period of time, the entire field should be photographed with infra-red film. The image on the infwrred film should be distinctive. Then, photographs of the drop zone area could be made with infzered film after a similar exposue to warm sunshine and the films, when processed, could be examined for an image similar to that made by the “dummy " ointed out that in view of the almost. complete absence of man-made objects or metal objects in the ‘rugged regions of the drop zone area, there should not be any materials there which would yield similar images. Infrmation available to Portland indicates the wind believed to be in effect in the drop zone area at the time tHe hijacker parachuted was coming from the southwest, If that is the case and the Northwest engineers who computed the location of the drop zone and the prime line along which UNSUB presumedly fell were using southwest wind information, then the calculations of the location of the drop zone may .: not be accurate. A shift of wind from the west to the south would push the east end of the prime line to the north in a counter-clockwise direction. It could cause previously unsearched territory to the west of the drop zone to be includelin a new -amended drop zone. LEAD SEATTLE AT _SEATILE, WASHINGTON. Will consider causing a dicussion of this matter with the Northwest Airlines engineers who computed the dro sis matter to determine whether the information fr is of any significance. bé b7C ARMED AND DANGEROUS ) DB Cooper-15413