June 5:
Measured the sonic azimuths to be 265 deg magnetic. (Note the declination on the compass was actually ~ 1 degree east, not zero.)
Magnetic declination is about 2 deg W here, so the sonic azimuths are about 263 deg true.
June 5:
Measured the sonic azimuths to be 265 deg magnetic. (Note the declination on the compass was actually ~ 1 degree east, not zero.)
Magnetic declination is about 2 deg W here, so the sonic azimuths are about 263 deg true.