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be Saad i 3/2/73 | AIRTEL AIRMAIL : FROM: SAC, SEATTLE (164~-81)(P) TO: ACTING DIRECTOR, FBI (16-2111) SUBJECT: NORJAK 00: SEATTLE MONTHLY SUMMARY Re: Seattle airtel to the Buraau, 2/7/73. SEARCH AREA AND COURSE In attempt to determine the accuracy of the first scurch area, the following was learned: The first search area was calculated using a systen of plotting known as "GEOREF" (i.e. Geographical Reference) Which has a plotting error of plus or minus one mile. A new plotting system using a computer senerated latitude and lonri~ tude has a plotti @ S$ or minuS 1/2 mile. Using the new system, Northwest Orlent Airlines[_—] b6 plotted a new course for the Norjak airplane and a new searc bIC arta based on the new course, The new search area is partially outside the first area. It is felt that if Unsub's parachute opened, ha is no lonrer in the southwest Washington area, but if Hs parachute did not open, he would be in a corridor along the flight path. The time of jump is known, and an area approximately one mile by seven wiles represents the area Unsub. would heave landed in if his parachute did not open. Seattle Division is ourrantly making arrangements to search that portion of the above deseribed araa not previously searched. ARTIST SKETCH 4 - Bureau Seattle Safin’ DB Cooper-10802 [uel- §1- SVP 7