 Other Geoceivers were taken out in the field in Antarctica during the summer and were used to measure locations, for example the movement of the Ross Ice Shelf.Since no computer small enough to fit through a submarine's hatch existed (in 1958), a new computer was designed, named the AN/UYK-1 (TRW-130).It was built with rounded corners to fit through the hatch and was about five feet tall and sealed to be waterproof.