First C&GS; electronic base line measurements.Base crossings by ship over Shoran network.Minimum value from two range-range stations gives distance.C&GS; Ship EXPLORER
3/18/2019 2:18:34 PM
Date: 1951
Credit: C&GS; Season's Report 1951-92
Location: Alaska, Bering Sea
Subject: Geodesy
Subject: Triangulation
Subject: Baseline
Subject: Electronic