History
United States
Name	USC&GS Davidson (CSS 31)
Namesake	George Davidson (1825-1911), an accomplished geodesist and United States Coast Survey official
Operator	U.S. Coast and Geodetic Survey
Builder	Norfolk Shipbuilding and Drydock Company, Norfolk, Virginia
Launched	7 May 1966
Sponsored by	Mrs. George P. Miller
Commissioned	10 March 1967
Fate	Transferred to National Oceanic and Atmospheric Administration 3 October 1970
United States
Name	NOAAS Davidson (S 331)
Namesake	Previous name retained
Operator	National Oceanic and Atmospheric Administration
Acquired	Transferred from U.S. Coast and Geodetic Survey 3 October 1970
Out of service	1989
Stricken	1997
Homeport	Seattle, Washington
Identification	IMO number: 6613914 MMSI number: 657262000 Callsign: WTEK (Whiskey Tango Echo Kilo)
Fate	Sold Became private American research vessel Later became a Nigerian oilfield security vessel
Status	Active as oilfield security vessel in Nigeria
General characteristics
Class and type	McArthur-class hydrographic survey ship
Tonnage	854 gross register tons; 207 net register tons
Displacement	995 tons (full load)
Length	175 ft (53 m)
Beam	38 ft (12 m)
Draft	12.1 ft (3.7 m)
Installed power	1,600 horsepower (2.1 megawatts)
Propulsion	Two General Motors diesel engines, twin controllable-pitch propellers, 186 tons fuel
Speed	12 knots (22 km/h; 14 mph)
Range	6,000 nautical miles (11,000 km; 6,900 mi) at 12 knots (22 km/h; 14 mph)
Endurance	17 days
Complement	Either 23 (6 officers and 17 crew) plus up to 13 scientists[1] or 38 (8 NOAA Corps officers, 3 licensed engineers, and 27 other crew, plus up to 2 scientists[2]
Notes	440 kilowatts electrical power; Hydroplot data-recording system

NOAAS Davidson (S 331) was a survey ship in commission in the National Oceanic and Atmospheric Administration (NOAA) from 1970 to 1989. Prior to her NOAA service, she was in commission in the United States Coast and Geodetic Survey from 1967 to 1970 as USC&GS Davidson (CSS 31), the second Coast and Geodetic Survey ship of the name. She was the only sister ship of NOAAS McArthur (S 330).

Davidson was built for the U.S. Coast and Geodetic Survey as a "coastal survey ship" (CSS) and was launched by the Norfolk Shipbuilding and Drydock Company at Norfolk, Virginia, on 7 May 1966,^[3] sponsored by Mrs. George P. Miller.^[4] The Coast and Geodetic Survey commissioned her on 10 March 1967 as USC&GS Davidson (CSS 31), the second Coast and Geodetic Survey ship to bear the name. When the Coast and Geodetic Survey merged with other agencies to form NOAA on 3 October 1970, she became part of the NOAA fleet as NOAAS Davidson (S 331).

With her home port at the Pacific Marine Center, Seattle, Washington, Davidson, along with her only sister ship, McArthur, spent her career conducting hydrographic surveys along the United States West Coast; in Alaskan waters, including in Prince William Sound in 1974, Tracy Arm, Endicott Arm, and Skagway Harbor; in San Diego Bay in 1975; and in the Pacific Ocean. She had a Bathymetric Swath Survey System (a stabilized deep-mapping sonar) and a Hydroplot data-recording system.

Taken out of service in 1989, Davidson was stricken in 1997 without ever having been formally decommissioned.^[5] After her disposal by NOAA, Davidson was operated for many years by Ocean Services Inc. a company in Seattle and with her home port in Sitka, Alaska. She was used as a survey and research vessel in the Gulf of Mexico, the Caribbean, South America, Alaska, and various locations in the Pacific. In 2002 from Feb 28th through May 11 she was chartered by Nauticos to search for Amelia Earhart's Lockheed 10E Electra. She was eventually sold to interests in Nigeria and operates there as a security vessel in the Nigerian offshore oilfields.

• NOAA History, A Science Odyssey: Tools of the Trade: Ships: Coast and Geodetic Survey Ships: Davidson
• Couhat, John Labayle, and A. D. Baker III, eds. Combat Fleets of the World 1984/1985: Their Ships, Aircraft, and Armament. Annapolis, Maryland: United States Naval Institute, 1984. ISBN 0-87021-136-6.
• Prézelin, Bernard, and A. D. Baker III, eds. The Naval Institute Guide to Combat Fleets of the World 1990/1991: Their Ships, Aircraft, and Armament. Annapolis, Maryland: United States Naval Institute Press, 1990. ISBN 0-87021-250-8.
• Jourdan, David W. The Deep Sea Quest for Amelia Earhart. Cape Porpoise, Maine: Ocellus Productions, 2010. ISBN 978-0-9843282-0-8