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

4900 thumbnail picture
Hydrographic signal as seen from sea
4901 thumbnail picture
A pole signal at Station Clarence Astro. Party off of EXPLORER
Seward Peninsula, Alaska 1950
4902 thumbnail picture
Tripod signal on south coast of American Samoa. Built by party off of SURVEYOR
American Samoa 1971
4903 thumbnail picture
Station Pic at west end of Picara Point. Building party off of WHITING
Picara Point, St. Thomas, U.S. Virgin Islands 1975
4904 thumbnail picture
Station Pic at west end of Picara Point. Building party off of WHITING
Picara Point, St. Thomas, U.S. Virgin Islands 1975
4905 thumbnail picture
Building signal at Station Out. Building party off of WHITING
Outer Brass Island, U.S. Virgin Islands 1975
4906 thumbnail picture
The way to Station Can. Building party off of WHITING
U.S. Virgin Islands, Congo Cay 1975
4907 thumbnail picture
Signal and navigation trisponder at Station Can. Installation by party off of WHITING
U.S. Virgin Islands, Congo Cay 1975
4908 thumbnail picture
Signal and navigation trisponder at Station Can. Installation by party off of WHITING
U.S. Virgin Islands, Congo Cay 1975
4909 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
4910 thumbnail picture
Triangular hydro signal. Building party off of PATHFINDER
Hawaii 1970
4911 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
4912 thumbnail picture
Signal building party off of PEIRCE
September, 1972
4913 thumbnail picture
Large tripod signal being built. Building party off of PEIRCE
September, 1972
4914 thumbnail picture
Signal building party in Southeast Alaska. Party off of PATHFINDER
Southeast Alaska 1971
4915 thumbnail picture
Signal in Prince William Sound
Prince William Sound area
4916 thumbnail picture
Signal in Prince William Sound
Prince William Sound area
4917 thumbnail picture
Signal in Penobscot Bay. Signal built by party off of PEIRCE
Penobscot Bay, Maine 1985
4918 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
4919 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
4920 thumbnail picture
Planting a survey signal buoy. Off LYDONIA or NATOMA
United States East Coast 1929?
4921 thumbnail picture
Constructing a floating buoy signal. Buoy in place. For use by East Coast wiredrag party
United States East Coast 1917
4922 thumbnail picture
Signal off the Delaware coast. Planted by RANGER
Delaware coast 1929
4923 thumbnail picture
A floating signal. Photograph in 1931 Hydrographic Manual
4924 thumbnail picture
Floating signal off the Delaware coast. Party off of RANGER
Delaware coast 1929
4925 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
4926 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
4927 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
4928 thumbnail picture
White-washing hydrographic signals in Alaska.
1930?
4929 thumbnail picture
Signal party white-washing rock. Party off of EXPLORER
Rudyerd Bay, Southeast Alaska 1931
4930 thumbnail picture
White-washing rock. Party off of LESTER JONES
4931 thumbnail picture
Preparing white-wash for marking signal. At Station ACT on Amchitka Island. Party off of EXPLORER
Alaska, Amchitka Island, Aleutian Islands 1949
4932 thumbnail picture
Taking sextant angles for positioning vessel.
4933 thumbnail picture
Working together for a three-point sextant fix. Note horizontal attitude of sextants
Southeast Alaska 1916
4934 thumbnail picture
Calibrating Raydist by using three-point sextant fix. Initial tests of Raydist off of SOSBEE
Tampa Bay area, Florida 1954
4935 thumbnail picture
Launch hydrography three-point sextant fix. Surveying lagoon at Kwajalein Island. Party off of PIONEER
Kwajalein Island, Pacific 1960
4936 thumbnail picture
Launch hydrography three-point sextant fix. Surveying in vicinity of Kalgin Island. Party off of SURVEYOR
Alaska, Cook Inlet, Kalgin Island 1967
4937 thumbnail picture
Wharton and Jeffries taking three-point sextant fix. Surveying in vicinity of Kalgin Island. On SURVEYOR
Alaska, Cook Inlet, Kalgin Island 1967
4938 thumbnail picture
Taking three-point sextant fix with check angle. Calibrating electronic navigation system. Third man searching for signal. On NOAA Launch 1255
1981
4939 thumbnail picture
Taking three-point sextant fix with check angle. Calibrating electronic navigation system. On NOAA Launch 1255
1981
4940 thumbnail picture
Checking index error of sextants prior to conducting launch hydrography.
4941 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
4942 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
4943 thumbnail picture
Plotting three-point sextant fix with metallic three-arm protractor. On the FATHOMER
Philippines 1928
4944 thumbnail picture
Manual plotting of three-point sextant fix. Using plastic three-arm protractor
4945 thumbnail picture
Geometry of the three-point sextant fix. Diagram shows shoreline, stations, and angles measured. 1931 Hydrographic Manual
4946 thumbnail picture
Graphic of various combinations of strong and weak three-point fixes. Hydrographic Manual
4947 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
4948 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
4949 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

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Last Updated:
April 30, 2013