MADAR Node 137 documents a significant compass heading change within 5 mins of Cambridge sighting.

Our study showed compass heading change in the MSV (Multi Sensor Verification)  range of 3 degrees from 111.12 to 108.13 in five minutes beginning at 01:47:19 UTC, but without the qualifying field reading change that normally triggers the device, which in this case would need to be in excess of the threshold of 29. This is still VERY interesting in view of the compass heading change for three reasons: 1) Three degrees under controlled conditions is considered as significant, just as 2.5 times local background radiation is considered as significant. 2) Original MADAR was based on CHC (compass heading change) and was successful in several instances, and no field readings in milligaus were available at the time. 3) 3.5 miles was given as the distance between the sighting location and the MADAR site at Canton and occurred within 5 minutes of each other!