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Heliotrope and observing instrument at Station Gatacre (secondary tria...
Tower erection camp at Station Duck on Great Duck Island.
Camp No
Building an 18-foot outside section of a gas pipe tower at Station Det...
Station Hayes
Observing tower at Station Detour
Station Burnt Point
Coast and Geodetic Survey tide house.
Shoran installation on radar tower
Satellite Antenna
Unhooking launch from ship.
Diagram of buoy for deploying Roberts Radio Current Meter.
Wiredrag work in Alaska by the Coast and Geodetic Survey Ship EXPLORER...
Lowering transducer of portable 808 Fathometer system.
Sounding by means of depth recorder demonstrated by Captain Clarence B...
Magnetic observations at sea from the USC&GSS BACHE
Launch from the USC&GSS WESTDAHL taking soundings at Taku Glacier.
Deep sea sounding gear rigged for work
Plotting the field data in the ship's office
Components of an early electronic navigation system
Shoran ground station at West Point on Puget Sound near Seattle
Instrument racks, teletypes, and computer tapes (including paper tapes...
C&GS Atlantic Marine Center ship base prior to renovation.
Chief Survey Technician removing seawater from Nansen bottle for anals...
Field magnetic observations.
Working at the Cheltenham Magnetic Observatory.
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