...
Magnetic declination is about 2 deg W here, so the sonic azimuths are about 263 deg true.
June 12:
The consensus is that my azimuth measurement was in error by 180 degrees.
...
Magnetic declination is about 2 deg W here, so the sonic azimuths are about 263 deg true.
June 12:
The consensus is that my azimuth measurement was in error by 180 degrees.