Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
KetchikanM-Dz1828.8 m (barometer)1.61 km8,530 km
PetersburgM-D304.8 m above ground1.61 km13,921 km
CraigM-D304.8 m above ground1.61 km9,222 km
Bradfield CanalM/R-D121.92 m 9.66 km716 km
CraigM/R-D121.92 m 9.66 km1,497 km
KetchikanM/R-D121.92 m 9.66 km1,609 km
PetersburgM/R-D121.92 m 9.66 km1,473 km