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Sitting in the back of the truck (left) is a U.S. Army GR-3 Sound Ranging Set, normally used by field artillery observation units but adapted for use in Project MOGUL. The set was employed for the MOGUL operations at White Sands Proving Ground in July 1947. The detonation, or “shot” (right), of 500 pounds of TNT was monitored at White Sands Proving Ground, NM, in July 1947, by Project MOGUL balloon and ground-based sensors. Photo Collection of Albert P. Crary.
[figure]
This modified PT boat that was assigned to Project MOGUL is shown here off Block Island, RI. Col. Marcellus Duffy eliminated it and several others from the project when Headquarters U.S. Army Air Forces expressed concerns over the progress of MOGUL under the previous project officer. Photo collection of Albert P. Crary.