The first Odessey Protractor.This instrument was used to plot intersecting ranges from two RAR stations.Invented while Herman Odessey attached to DISCOVERER.Variations of this instrument were used for plotting positions for over 60 years
3/20/2019 12:32:35 PM
Date: 1929
Credit: C&GS; Season's Report Odessey 1929-60
Subject: Charting
Subject: Navigation
Subject: Electronic
Subject: Radio-Acoustic Ranging