Part 78, page 269

Transcript

The scan is the source; the transcript is machine-generated from it.

SE 164-81

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all received expeditious and thorough attention but all results were negative.

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SECOND TERRAIN SEARCH

In attempt to determine the accuracy of the first search area, the following was learned:

The first search area was calculated using a system 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 generated latitude and longitude has a plotting error of plus or minus 1/2 mile. Using the new system, [REDACTED] Northwest Orient Airlines [REDACTED] plotted a new course for the NORJAK airplane and a new search area based on the new course. The new search area based on the new course. The new search area is partially outside the first area. (See maps.)

It is felt that if Unsub's parachute opened, he is no longer in the southwest Washington area, but if his 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 miles represents the area Unsub would have landed in if his parachute did not open.

Because some of the above corridor fell in the old or first terrain search area, only an area 2 miles by 1/2 mile was searched during the second terrain search.

The second terrain search commenced March 12, 1973, and involved 10 Special Agents of the Seattle Office. It was temporarily interrupted on March 16 and resumed again March 26, 1973.

The second terrain search was completed March 29, 1973 with nothing found.

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b6 b7c

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DB Cooper-34141

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28.