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NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Catalog of Images

5600 thumbnail picture
Station Hans at south end of Hans Lollik Island. Building party off of WHITING. Note century plants and desert aspect of island
U.S. Virgin Islands, Hans Lollik Island 1975
5601 thumbnail picture
Triangular hydro signal. Building party off of PATHFINDER
Hawaii 1970
5602 thumbnail picture
Hydro signal being built for calibration of Raydist system. Building party off of NOAA Launch 1257. Glenn Hendrix kneeling, Steve Lloyd standing
Florida, Cape San Blas 1977
5603 thumbnail picture
Signal building party off of PEIRCE
September, 1972
5604 thumbnail picture
Large tripod signal being built. Building party off of PEIRCE
September, 1972
5605 thumbnail picture
Signal building party in Southeast Alaska. Party off of PATHFINDER
Southeast Alaska 1971
5606 thumbnail picture
Signal in Prince William Sound
Prince William Sound area
5607 thumbnail picture
Signal in Prince William Sound
Prince William Sound area
5608 thumbnail picture
Signal in Penobscot Bay. Signal built by party off of PEIRCE
Penobscot Bay, Maine 1985
5609 thumbnail picture
Dismantling the signal at Station Out, Thatch Cay. Cleaning up at the end of a project. Lt.(j.g.) Mike Kuhl cutting wire securing signal
Thatch Cay, U.S. Virgin Islands 1975
5610 thumbnail picture
Flags on bell and whistle buoys. Using harbor buoys for signals for survey work off the BACHE. Black flags showed up best
Southeast Coast of United States 1915
5611 thumbnail picture
Planting a survey signal buoy. Off LYDONIA or NATOMA
United States East Coast 1929?
5612 thumbnail picture
Constructing a floating buoy signal. Buoy in place. For use by East Coast wiredrag party
United States East Coast 1917
5613 thumbnail picture
Signal off the Delaware coast. Planted by RANGER
Delaware coast 1929
5614 thumbnail picture
A floating signal. Photograph in 1931 Hydrographic Manual
5615 thumbnail picture
Floating signal off the Delaware coast. Party off of RANGER
Delaware coast 1929
5616 thumbnail picture
Tautwire measuring machine. By trailing wire astern and counting revolutions, one can determine distances. Used to measure distance between floating hydrographic signals
New York Bight area 1939
5617 thumbnail picture
White-washed hydrographic signals in Taku Inlet area. Who says engineers can't be artistic? Signal made by crew off of WESTDAHL
Taku Inlet area, Alaska 1936
5618 thumbnail picture
ORCA signal in Taku Inlet. Told tourists in area that signals were native hieroglyphics. Signal made by crew off of WESTDAHL
Taku Inlet area, Alaska 1936
5619 thumbnail picture
White-washing hydrographic signals in Alaska.
1930?
5620 thumbnail picture
Signal party white-washing rock. Party off of EXPLORER
Rudyerd Bay, Southeast Alaska 1931
5621 thumbnail picture
White-washing rock. Party off of LESTER JONES
5622 thumbnail picture
Preparing white-wash for marking signal. At Station ACT on Amchitka Island. Party off of EXPLORER
Alaska, Amchitka Island, Aleutian Islands 1949
5623 thumbnail picture
Taking sextant angles for positioning vessel.
5624 thumbnail picture
Working together for a three-point sextant fix. Note horizontal attitude of sextants
Southeast Alaska 1916
5625 thumbnail picture
Calibrating Raydist by using three-point sextant fix. Initial tests of Raydist off of SOSBEE
Tampa Bay area, Florida 1954
5626 thumbnail picture
Launch hydrography three-point sextant fix. Surveying lagoon at Kwajalein Island. Party off of PIONEER
Kwajalein Island, Pacific 1960
5627 thumbnail picture
Launch hydrography three-point sextant fix. Surveying in vicinity of Kalgin Island. Party off of SURVEYOR
Alaska, Cook Inlet, Kalgin Island 1967
5628 thumbnail picture
Wharton and Jeffries taking three-point sextant fix. Surveying in vicinity of Kalgin Island. On SURVEYOR
Alaska, Cook Inlet, Kalgin Island 1967
5629 thumbnail picture
Taking three-point sextant fix with check angle. Calibrating electronic navigation system. Third man searching for signal. On NOAA Launch 1255
1981
5630 thumbnail picture
Taking three-point sextant fix with check angle. Calibrating electronic navigation system. On NOAA Launch 1255
1981
5631 thumbnail picture
Checking index error of sextants prior to conducting launch hydrography.
5632 thumbnail picture
The tools of the trade for navigating during launch hydrography. Metallic and plastic three-arm protractors for plotting three-point fixes. Sextant in background. 1931 Hydrographic Manual
5633 thumbnail picture
Checking boatsheet during wiredrag survey of Mitchell Jordan Reservoir. Plastic three-arm protractor for plotting fixes barely visible under hand. Surveying reservoir for seaplane landing site during WWII ferrying operations. Wiredrag party of Max G. Ricketts
Alabama, Mitchell Jordan Reservoir 1942
5634 thumbnail picture
Plotting three-point sextant fix with metallic three-arm protractor. On the FATHOMER
Philippines 1928
5635 thumbnail picture
Manual plotting of three-point sextant fix. Using plastic three-arm protractor
5636 thumbnail picture
Geometry of the three-point sextant fix. Diagram shows shoreline, stations, and angles measured. 1931 Hydrographic Manual
5637 thumbnail picture
Graphic of various combinations of strong and weak three-point fixes. Hydrographic Manual
5638 thumbnail picture
Graphic demonstrating Radio Acoustic Ranging (RAR). Developed in 1923, RAR was the first non-visual navigation system. Combined velocity of sound in water with radio to obtain fix.
Georges Bank 1931
5639 thumbnail picture
Planting a hydrophone anchor with the cable attached. On the GUIDE. Hydrophone would pick up sound from RAR TNT explosion.
Oregon, Cape Blanco area 1924
5640 thumbnail picture
Cable drum being pulled by horses across dunes. Cable lead to offshore hydrophone for Radio Acoustic Ranging. On the GUIDE
Oregon, Cape Blanco area 1924
5641 thumbnail picture
Electronics setup for Radio Acoustic Ranging shore station. Navigation station for the GUIDE
Oregon, Cape Blanco area 1924
5642 thumbnail picture
Planting anchor for Radio Acoustic Ranging hydrophone. Must have been warm - note bare foot helping push anchor away from ship
5643 thumbnail picture
A new type of hydrophone block for Radio Acoustic Ranging. On the GUIDE
San Clemente Island area, California 1925
5644 thumbnail picture
Transferring the hydrophone block and cable to launch for planting. Radio acoustic ranging operations on the GUIDE
San Clemente Island area, California 1925
5645 thumbnail picture
Launch laying the cable from hydrophone to the shore station. Radio acoustic ranging operations on the GUIDE
San Clemente Island area, California 1925
5646 thumbnail picture
Shore Radio Acoustic Ranging Station on San Clemente Island. Radio acoustic ranging operations on the GUIDE
San Clemente Island area, California 1925
5647 thumbnail picture
Radio operator at work at Radio Acoustic Ranging shore station KGHS. Radio acoustic ranging operations on the SURVEYOR
Alaska, Kodiak Island area 1929
5648 thumbnail picture
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
1929
5649 thumbnail picture
Radio Acoustic Ranging bomb making. TNT bombs were sound source for RAR. RAR work on OCEANOGRAPHER
Georges Bank, New England coast 1930

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Last Updated:
November 10, 2017