TeletypeUrgent teletype Portland to Seattle re VOR and marker beacon receivers as tracking devices29 November 1971page 2 of 2
teletypeLegibility: medium

Part 70, page 324

DB Cooper-30176Serials PD 164-41

Document date 29 November 1971

Open in FBI Vault (Part 70, page 324 of the PDF)

FBI 164-81, Vault Part 70 p. 324 (DB Cooper-30176), Teletype, dated 29 Nov 1971, serial SE 164-81-323 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-70/pages/324

Transcript

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

PD 164-41 PWGE TWO

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[REDACTED] ADVISED THE MOST LIKELY DEVICE TO BE USED IN SUCH A MANNER, AND DUE TO THE FLIGHT OF THE AIRCRAFT, WOULD BE THE MARKER BEACON RECEIVER, WHICH ACCORDING TO [REDACTED], COULD BE MADE BY ANY PERSON WPTH THE SLIGHTEST KNOWLEDGE OF COMMUNICATION OR RADIO EQUIPMENT. SUCH A DEVICE COULD BE THE SIZE OF A PACKAGE OF CIGARETTES OR FOR A MORE EXACTING DEVICE, COULD BE ANY SIZE.

[REDACTED] ADVISED THATHTHE BEACON RECEIVER WOULD WORK ON A NINE VOLT TRANSISTOR BATTERY AND SERIES WITH A NORMWL FLASHLIGHT BATTERY. SUCH A DEVICE CAN BE PURCHASED FROM ANY OF THE AVIATION COMPANIES FOR APPROXIMATELY TWO HUNDRED SEVENTYFIVE DOLLARS, WHICH [REDACTED] ADVISED IS THE MINIMUM PRICE. ACCORDING TO [REDACTED], THE MARKER BEACON RECEIVER WILL NOT INTERFER WITH ANY OF THE AIRCRAFT INSTRU- MENTS, NOR CAN IT BE DETECTED WHILE IN USE.

[REDACTED] ADVISED THE DISTRIBUTORS OF SUCH A DEVPCE IS NARCO AVIONICS, WHICH HAS DISTRIBUTORS THROUGHOUT THE COUNTRY, INCLUDING FIVE IN OREGON AND FIVE IN WASHINGTON.

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BASED UPON THE ABOVE INFORMATION AND PORTLAND TELEPHONE CALL TO SEATTLE, IT IS SUGGESTED SEATTLE DIVISION REEVALUATE LEADS SET OUT IN REFERENCED COMMUNICATIOM.

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CORR PAGE ONE THRID LINE FOURTH FOXX WORD SHLD READ [REDACTED] AND ELEVENTH LINE LAST WORD SHLD READ POLARIZED

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DB Cooper-30176