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![Duplex measures, ready to launch the rear bar theb1145.jpg Duplex measures, ready to launch the rear bar](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1145.jpg?itok=HBV6mqMy)
Description
Duplex measures, ready to launch the rear bar.After making contact, the rear bar was moved to the forward position.It was then realigned horizontally, vertically, and for azimuth on the base line. Fig. No. 8, Appendix No. 3, Report of Superintendent ... 1901, p. 244
Display Date
1901
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line