NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2025 Mar 12, 13:17 -0700
Dave Walden there are many sharper photographs on-line, but most are from ads, so they only give details of condition. Only one suggests it’s a plotting aid, presumably for tracking fast moving radar targets. ( https://jsqmall.com/products/vintage-computer-radar-aid-type-r-1-vaid-by-jbcarroll-co-usaf-aviation-tool-original-case-5149 ). Am I correct in assuming there is only one disc free to rotate on one side and a graph paper and azimuth ring plotting disc on the other. The black scales are a simple time, distance, speed circular slide-rule, as in the E6B. E.g. from the photograph here https://www.usmilitariaforum.com/forums/index.php?/topic/48577-air-force-marked-computer-radar-aid-type-r-1-vaid/ 30nm in 2.15 min is 835kts. The red scales are more interesting and appear to be there for combining raw radar head values to solve an unknown. However, it’s not brain surgery; we ought to be able to work it out between ourselves. DaveP
