Former NOAA vessel now doing commercial survey work .
http://en.wikipedia.org/wiki/NOAAS_Davidson_(S_331)

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
Home Port Sitka Alaska
Owner Stabbert Maritime
Off Southwest Pass, Gulf of Mexico 31/08/2005