Trimble DSM212 DGPS

The DSM12/212 is used by marine professionals for sub-meter positioning during applications such as precise positioning, dredging, hydrographic surveying, and high speed vessel positioning.

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NOAA Charting - Unimak Pass
Unimak, Alaska
TerraSond was contracted by NOAA to provide modern hydrographic survey data for updating the nautical charts north of Akun Island, Alaska, and also a portion of the Safety Fairway through Unimak Pass connecting the Bering Sea with the North Pacific Ocean.
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NOAA Charting - Alabama, Louisiana and Mississippi
Gulf of Mexico
We were contracted by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) to provide sidescan, single beam, and multibeam sonar services for Debris Mapping of the Alabama Fairways and Perdido Bay in the Gulf of Mexico.
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NOAA - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
Various Locations, Alaska
Since 1998, we have supplied the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) with hydrographic data of 100% bottom coverage with shallow-water multibeam sonar systems.
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NOAA Charting - Mississippi and Alabama
Gulf of Mexico
The U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) tasked TerraSond to provide multibeam sonar and sidescan sonar survey services so that nautical charts of the survey area in Mississippi and Alabama could be updated.
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USACE - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
Various Locations, Alaska
Since 1995, we have provided the U.S. Army Corps of Engineers (USACE) - Alaska District with hydrographic, topographic, and Global Positioning System (GPS) control surveys; aerial photography; LiDAR mapping; and tide studies on over five hundred projects throughout Alaska.
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NOAA - Nationwide IDIQ Contract for Hydrographic Surveys and Related Services
Various Locations, U.S.A
We understand NOAA's requirements and have the trained staff and equipment to perform their vital surveys. This 5-year term contract supports NOAA's nautical charting mission in Alaska, the Gulf of Mexico, and all other navigable waters of the U.S., including the East Coast, Pacific, Great Lakes, and U.S. territories.
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NOAA Charting - Tongass Narrows
Ketchikan, Alaska
We surveyed 1,666 lineal miles of sea floor with multibeam sonars and verified 92 miles of shoreline using National Geodetic Survey (NGS) Remote Sensor Data (RSD). As a result of the hydrographic surveys, 50 separate items were investigated and mapped.
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Navigation Channel Dredging - Knik Arm Shoal
Cook Inlet, Alaska
We provided USACE Class I dredge payment surveys that included a pre-dredge survey, 13 project condition surveys, and a post-dredge survey for the construction of a navigation channel along the southern flank of Knik Arm Shoal.
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Redondo Outfall Inspection
Seattle, Washington
Our hydrographers provided submarine acoustic positioning to a Remotely Operated Vehicle (ROV) during an as-laid outfall inspection.
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NOAA Charting - Upper Cook Inlet
Cook Inlet, Alaska
NOAA contracted us to supply hydrographic surveying data for 54.3 square miles of Cook Inlet, Alaska. Afterward, 3,898 lineal miles of multibeam surveys, and 55 lineal miles of side scan sonar surveys were added to the contract.
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Pipeline Construction to Osprey Platform
Cook Inlet, Alaska
We provided support services for a pipeline installation program in a very rough area of Cook Inlet that was exposed to weather from the north and south.
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Submarine Transmission Cable Installation
Cook Inlet, Alaska
We provided surveying and positioning services to support a 138-kilovolt (kV) submarine cable installation project. These services included a desk-top study, a pre-lay marine survey, a post-lay survey, Global Positioning System (GPS) control survey, and other support services during construction.
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Dredging Surveys and Volume Computations
Port of Anchorage, Alaska
We were contracted by a dredging firm to conduct independent bathymetric surveys and compute dredge quantities for the U.S. Army Corps of Engineers (USACE) - Alaska District's Port of Anchorage project. The annual dredging cost for the Port of Anchorage is approximately $10 million.
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USACE - Texas IDIQ Contract for Hydrographic Surveys and Related Services
Various Locations, Texas
Since 2003, TerraSond has provided and continues to provide hydrographic surveys and related support services for the Galveston District of the U.S. Army Corps of Engineers (USACE).
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Conceptual Engineering Services
Anchorage, Alaska
We participated in a road design and construction plan for a bridge across Knik Arm, a branch of Cook Inlet near Anchorage, Alaska. Our office staff collected background information about land and sub-sea contours, inlet currents and ice, area biology and regulatory requirements to provide to our client.
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Post Hurricane Rita Emergency Call-out Clearance Surveys
Various Locations, Texas
Our surveyors were tasked by the U.S. Army Corps of Engineers (USACE) - Galveston District to form immediate response teams to survey Texas ports the day after Hurricane Rita reached landfall. We acted fast to survey the Houston Ship Channel, and two other ports that were hit hard by the hurricane.
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Post Hurricane Ike Emergency Call-out Clearance Surveys
Various Locations, Texas
Working closely with the U.S. Army Corps of Engineers (USACE) - Galveston District, along with NOAA's National Weather Service and other agencies, we developed a plan of action before Hurricane Ike hit the Texas coastline.
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