The Effect of Variations in Indicator Design Upon Speed and Accuracy of Altitude Readings Open PDF Document Details Document Type Technical Report Publication Date Sep 02, 1947 Accession Number ADA800400 Entities People W. F. Grether Tags Communities of Interest Biomedical Weapons Technologies DTIC Thesaurus Topics Aircraft Equipment Aircrafts Airspeed Indicators Altimeters Altitude California Engineering Errors Flight Instruments Indicators Navy Psychology Radar Altimeters Radio Altimeters Telemetry Equipment Universities War Colleges