Category 11 Case Directory
Rating: 5  


AVCAT is a special project being conducted by NICAP, with the help and cooperation of the original compiler of AIRCAT, Dr. Richard Haines, and other sources, to create a comprehensive listing of sightings from aircraft with detailed documentation from these sources, including Projects SIGN, GRUDGE & BLUE BOOK.

Aircraft Encounters UFO / ADF, Etc. Affected
Nov. 4, 1957
Arangua, Brazil

A/c type DC-4
1 observer
No radar contact

Dr. Richard Haines:
Nov. 4, 1957; Ararangua, Brazil
Airliner ADF (direction finder), right generator and transmitter-receiver burned out during UFO sighting. See details below. *

Fran Ridge:
This was listed in the 1960 NICAP E-M report as item #41. In the secret Project SIGN report declassified on October 11, 1966, Appendix "C", page 22: (**) Method II -- Direct use of Earth's Magnetic Field) it states: "One observer [SIGN incident 68] noticed a violent motion of a hand-held compass. If we assume from this that the objects produced a magnetic field, comparable with the Earth's field; namely, 0.1 gauss, and that the observer found that the object subtended an angle 0 at his position, then the ampere-turns of the required electromagnet is given by ni=30R divided by 20, where R is the range of the object. For instance, if R is 1 Kilometer and the object is 10 meters in diameter, then ni = 1 billion ampere-turns. Now, if the object were actually only 10 meters away and were correspondingly smaller, namely, 10 cm in diameter, it would still require 10 million ampere-turns." This gives us an idea of the potentially dangerous situation that might be in play near aircraft, and in the case of the Brazil encounter on November 4, 1957.

Detailed reports and documents
reports/571104brazil_report (Dr. Richard Haines/NARCAP) *
images/771104brazil_C-54 (Dr. Ricahrd Haines/NARCAP) *
reports/571104brazil_report (ufologie)
madar/images/sign_22 [SECRET Project SIGN report] (Fran Ridge/MADAR Project) **

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