"We Called It Ice Sensing" Manuscript by Robert A. Nyden dates from 2009, and consists of a typed manuscript illustrated by colored photographs. It is a memoir written by Nyden that describes his time as a United States Navy polar aircraft navigator on flights to map the thickness of ice fields in Antarctica and Greenland between 1970 and 1974. It also has colored photographs depicting scenes from the flights, and charts containing data collected on these flights.