Radio plumbs massive glacier

Seismic soundings of ice, now widely made, are accurate but are also laborious, expensive, and time-consuming. A new method involving radio, being developed by the Army Signal Corps to plumb polar ice, has been successfully used to measure the depth of the Brae Glacier in the far-north region of Canada, about 20 miles south of Ellsmere Island. Radio soundings can be made quickly and with relatively simple equipment.