Manufacturer catalog

Nortek

Nortek is a Norwegian ocean-technology manufacturer focused on acoustic Doppler instruments for measuring motion in marine environments. Its public product lines include acoustic Doppler current profilers for ocean, coastal, river, port, harbor, buoy, and vessel-mounted survey work, plus Doppler velocity logs used for subsea navigation by unmanned vehicles, remotely operated systems, surface vehicles, and diver equipment.

3 weapons

Nortek AS was founded in Norway in 1996 by Atle Lohrmann and remains centered on underwater acoustic sensing. The company describes its technology as applying the Doppler effect to marine measurement: ADCPs profile currents, waves, turbulence, and other water-motion data, while DVLs provide navigation information where satellite positioning is unavailable underwater.

The company sits inside General Oceans, an underwater-technology group formed in 2021. Nortek's own 2024 GRI report identifies Nortek AS as a privately held company owned by General Oceans AS, with headquarters and manufacturing in Rud, Norway, and operating subsidiaries in Norway, the UK, the Netherlands, France, the United States, Brazil, Japan, China, and Australia.

For this catalog, Nortek is relevant through support-equipment records rather than weapon effects. The connected systems are marine sensors and survey/navigation packages that can appear in vessel, hydrographic, autonomy, and subsea operating contexts; the manufacturer profile does not assert conflict employment for any Nortek product.

Acoustic Doppler current profilersDoppler velocity logsVessel-mounted current-measurement systemsOceanographic sensorsSubsea navigation instruments

Notable Systems

Acoustic Doppler Current Profiler (ADCP), Current profiling instrument, Support Equipment

Acoustic Doppler Current Profiler (ADCP)

Current profiling instrument

Nortek's public material describes ADCPs as acoustic instruments that use Doppler-shifted returns to build water-velocity profiles for currents, waves, turbulence, and related marine measurement work.

Sources: Nortek ADCP guide, Nortek official website
Nortek Signature VM Coastal, Vessel-mounted acoustic Doppler current profiler package, Support Equipment

Nortek Signature VM Coastal

Vessel-mounted acoustic Doppler current profiler package

The VM Coastal package is a vessel-mounted ADCP system built around Signature 1000, 500, or 250 kHz instruments for river, delta, coastal, port, harbor, discharge, and mixing surveys up to 200 m depth.

Sources: Nortek VM Coastal
Nortek Signature VM Ocean, Vessel-mounted ocean acoustic Doppler current profiler package, Support Equipment

Nortek Signature VM Ocean

Vessel-mounted ocean acoustic Doppler current profiler package

The VM Ocean package uses 100, 75, or 55 kHz Signature instruments for large-vessel ADCP work, including long-range current profiling and optional scientific echosounder capability.

Sources: Nortek VM Ocean

Manufacturer History

  1. Nortek AS is founded in Norway

    Nortek's history page says Atle Lohrmann founded Nortek AS in Norway in 1996, beginning the company's subsea-technology work.

    Sources: About Nortek

  2. Aquadopp and Aquadopp Profiler introduced

    Nortek identifies 1998 as the introduction of the Aquadopp and Aquadopp Profiler, product names it describes as foundational to its ADCP portfolio.

    Sources: About Nortek

  3. General Oceans is formed

    Nortek's history page says General Oceans was created in 2021 as a holding company for complementary ocean-technology companies, with Nortek under that corporate umbrella.

    Sources: About Nortek, General Oceans 2025 Annual Report

  4. Nortek reports global operations and Norwegian manufacturing

    Nortek's 2024 GRI report lists 171 staff, a network of exclusive distributors, headquarters and manufacturing in Rud, Norway, and operating subsidiaries across Europe, the Americas, Asia, and Australia.

    Sources: Nortek 2024 GRI Report

Website links
Official websiteAbout NortekGeneral Oceans brand pageNortek HQ directory record

The profile covers Nortek AS, the Norwegian ocean-technology company at nortekgroup.com. It is distinct from unrelated U.S. HVAC and building-technology companies that have also used the Nortek name.

Manufacturer Sources

  • Nortek official websitePublisher: Nortek | Note: Supports Nortek's public identity as a marine-sensor manufacturer and its ADCP, DVL, oceanography, subsea-navigation, and defense-and-security application context. | Accessed: 2026-07-11
  • About NortekPublisher: Nortek | Note: Supports the 1996 founding in Norway, Aquadopp and Signature timeline events, and General Oceans relationship. | Accessed: 2026-07-11
  • Nortek 2024 GRI ReportPublisher: Nortek | Note: Supports legal name, General Oceans ownership, headquarters in Rud, Norway, Norwegian manufacturing site, global operating subsidiaries, and 2024 staffing/distributor context. | Accessed: 2026-07-11
  • Nortek Norway HQ directory recordPublisher: SeaDataNet European Directory of Marine Organisations | Note: Supports the Vangkroken 2, 1351 Rud, Norway headquarters address and describes Nortek's Doppler-based underwater acoustic instruments. | Accessed: 2026-07-11
  • Nortek ADCP guidePublisher: Nortek | Note: Supports ADCP operating principles and Nortek's description of ADCP applications in currents, waves, turbulence, and subsea navigation. | Accessed: 2026-07-11
  • Nortek VM CoastalPublisher: Nortek | Note: Supports VM Coastal product role, frequency options, survey uses, 200 m depth statement, and hardware components. | Accessed: 2026-07-11
  • Nortek VM OceanPublisher: Nortek | Note: Supports VM Ocean product role, 100/75/55 kHz options, long-range and high-resolution current profiling, and optional echosounder capability. | Accessed: 2026-07-11
  • NOAA Ocean Exploration ADCP explainerPublisher: NOAA Ocean Exploration | Note: Supports ADCP measurement context for the representative current-profiler class. | Accessed: 2026-07-11
  • General Oceans brand pagePublisher: General Oceans | Note: Supports Nortek's place among General Oceans brands and summarizes Nortek's ADCP and DVL systems for ocean science, subsea navigation, offshore operations, defense, weather forecasting, and marine energy applications. | Accessed: 2026-07-11
  • General Oceans 2025 Annual ReportPublisher: General Oceans | Note: Supports General Oceans corporate information, registered office at Vangkroken 2 in Rud, and the group's development and manufacture of oceanographic sensors and underwater vehicle systems. | Accessed: 2026-07-11

Produced weapons

Category

Support Equipment

Transport, logistics, recovery, command, engineering, and other enabling equipment.

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Acoustic Doppler Current Profiler (ADCP), Current profiling instrument, Support EquipmentAcoustic Doppler Current Profiler (ADCP)Current profiling instrumentBuilt in: United States / NorwayAcoustic Doppler Current Profiler (ADCP) is a hydroacoustic current-measurement instrument that uses Doppler-shifted sound returns to profile water-current speed and direction through the water column. Teledyne RD Instruments, Nortek, NOAA, NASA, and USGS sources document ADCPs as shipboard, moored, seafloor, buoy, vehicle-mounted, and river-discharge instruments, with the cataloged Haixun 08 fit showing how this commercial sensor class appears in a hydrographic survey-vessel suite.
Nortek Signature VM Coastal, Vessel-mounted acoustic Doppler current profiler package, Support EquipmentNortek Signature VM CoastalVessel-mounted acoustic Doppler current profiler packageBuilt in: NorwayNortek Signature VM Coastal is a Norwegian vessel-mounted acoustic Doppler current profiler package for vessel-of-opportunity surveys in rivers, deltas, coastal waters, ports, harbors, discharge sections, and mixing studies. Nortek frames the package around Signature 1000, 500, or 250 kHz ADCP instruments, a fairing bracket, GNSS satellite compass, compact processing unit, and acquisition/review software, with the lower-frequency 250 kHz lane extending the coastal family toward 200 m profiling contexts.