Trimble 4000

The 4000MSK DGPS Reference Station receiver combines Trimble's GPS receiver and marine band Minimum Shift Keying (MSK) modulator technologies into one unit. The 4000MSK DGPS Reference Station, combined with the 4000IM MSK Integrity Monitor and the Beacon Control System Software (BCS), provides the most straightforward means of establishing a differential GPS service utilizing either existing or new radiobeacon sites.

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Surveyor using Trimble MSK DGPS.
Surveyor using Trimble MSK DGPS.

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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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Nome Navigation Improvements
Nome, Alaska
We were contracted by a large construction company to establish a control network and to provide progress checks for hydrographic and topographic surveys for the U.S. Army Corps of Engineers (USACE) - Alaska District in Nome, Alaska. Our surveying services were used to support the design project for a new harbor and entrance. Included in the project was also a large breakwater extending offshore.
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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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Homer Spit Beach Condition Surveys
Homer, Alaska
Tasked by the U.S. Army Corps of Engineers (USACE) - Alaska District, TerraSond conducted beach condition surveys on the Homer Spit in Alaska. Ground topographic surveys were performed using Real-Time Kinematic (RTK) Global Positioning System (GPS) control methods.
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Bethel Bank Stabilization
Bethel, Alaska
TerraSond provided surveying and Global Positioning System (GPS) control surveys for the Bethel Bank Stabilization project; a project that has involved city, state and federal agencies for the past twenty years.
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Harbor Mountain Road Design
Sitka, Alaska
We were contracted by the U.S. Department of Agriculture U.S. Forest Service, Alaska Region to perform a preliminary line survey and hydro-site surveys in preparation for the engineering upgrade design of an existing 4.8 mile (7.6 kilometer) mountain road used as the primary access to public recreational facilities.
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Kivalina Village Relocation
Kivalina, Alaska
We were contracted by the U.S. Army Corps of Engineers (USACE) - Alaska District to provide surveying services for the relocation of the village of Kivalina, Alaska. Services included aerial photography, topographic and hydrographic surveys, and support for field measurements of the existing town-site. The resulting services produced a storm surge analysis for possible relocation of the village.
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Support Surveys for Wildwood Air Force Station Remediation
Kenai, Alaska
Our surveyors performed a primary control monumentation survey, preliminary topographic and quantity calculations, construction and grading layouts and final as-built surveys of contaminated sites for the Wildwood Air Force Station Phase II Remediation Project.
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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 - Kasaan Bay
Kasaan Bay, Alaska
NOAA contracted us to provide hydrographic surveying and support services in Kasaan Bay, Alaska. This survey was comprised of two Task Orders for multibeam surveying, shoreline verification, shoreline buffer, and Automated Wreck and Obstruction Information System (AWOIS) investigations on 13 sites.
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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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Mine Debris Consolidation and Disposal
Southwestern, Alaska
Our surveyors conducted field surveys for the Bureau of Land Management (BLM) Red Devil Mine Debris Consolidation and Disposal project, then measured and established limits for the excavation of two monofill sites.
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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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Northeast Cape - White Alice Communications Systems Site Surveys
St. Lawrence Island, Alaska
Our surveyors conducted a primary project control survey, secondary control layout survey for engineering purposes, and post-demolition locate surveys for the White Alice Communications Systems (WACS) on St. Lawrence Island, Alaska.
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Wrangell Narrows Tide Stations
Wrangell, Alaska
We were tasked by the USACE - Alaska District to conduct tide surveys for the purpose of refining and adding continuity to the historical Tidal Datums located along the southern end of Wrangell Narrows, Alaska. The four selected tide stations provided vertical control datum for two USACE - Alaska District projects located within the vicinity of Mile 12 to Mile 21.
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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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Channel Clearance Surveys - Texas
Ingleside, Texas
For this project, we were tasked by the U.S. Army Corps of Engineers- Galveston District, to conduct multiple high resolution repeat surveys for the Jewell-Fulton Channel, LaQuinta Channel, Corpus Christi Channel, and Aransas Pass Entrance Channel, using multibeam and sidescan sonar for data collection.
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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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Kenai Peninsula Flood Plain Mapping
Kenai, Alaska
We were tasked by the U.S. Army Corps of Engineer Alaska District to survey the flood plain for three rivers on the Kenai Peninsula. Various surveys were conducted using aerial Light Detection and Ranging (LiDAR) sensors, single beam sonar systems and Real-Time Kinematic (RTK) Global Positioning System (GPS) topographic survey equipment.
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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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NOAA Charting - Port Clarence and Nome
Norton Sound, Alaska
NOAA tasked us with providing hydrographic surveying and support services for the Approaches to Nome and Port Clarence in the Norton Sound along the Bering Sea, Alaska.
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