SewerBatt™: Acoustic sensing technology used to identify defects, breaks or blockages in pipework/drain & sewer pipes.

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DeepWater Buoyancy

Syntactic foam instrument buoys and ADCP Buoys, Hydro-Float, Cable Floats, ROV Buoyancy, CoreTec Drilling Riser Buoyancy Modules.

EdgeTech

Side scan Sonar, Sub-Bottom Profilers, Bathymetry systems, Underwater Positioning & Navigation, Acoustic Releases & Transponders, 
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Falmouth Scientific Inc

Portable Side Scan Sonar, Portable Low Frequency Acoustic Seismic Profiler BUBBLE PULSAR, Transducers, Current Wave Metres 2D & 3D, Tide Systems, Solar AUV, Underwater Structural Stress Monitoring System.

Focal Technologies (Moog)

Single and multi channel FORJs (Fibre Optic Rotary Joints), Hybrid Electrical and Optical Fibre Slip Ring sets.
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FlowLab Technologies

A complete range of instruments for flow measurement. FlowLab provides instruments with two measurement technologies: electromagnetic and ultrasonic (transit time).
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General Acoustics

General Acoustics is a leading edge technology producer of special echo-sounders, water level and wave sensors as well as flow measuring systems.

General Oceanics Inc.

CTD Instruments, Rosette Water Sampling, Niskin Water Samplers, Current Metres, Flow Metres, Plankton and Oil Spill Nets, Data Loggers & Sensors.
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HydroGroup

Hydrocable: Subsea electrical, optical and hybrid cables and umbilicals.

Hydrobond: Subsea electrical and optical connectors, penetrators and assemblies.

Imenco

Underwater Colour Cameras, Continuous Pan & Tilt Camera, High Resolution Colour Camera, Colour Zoom Camera, Underwater HDTV HD-SDI Colour Zoom & Digital Camera, Subsea HDTV Compact Colour Zoom Camera, BIT Low Light CCD Camera 
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KC Denmark

Water Samplers, Niskin Water Samplers, Sediment Samplers, Van Veen Grabs, Box Corers, Multi Corer, Piston & Gravity Corers, Kajak Samplers, Plankton Nets.

Hydroid Inc

Autonomous Underwater Vehicles (AUV) REMUS 100, REMUS 600, REMUS 6000, LARS, Gateway Buoy.
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Kongsberg Mesotech

Single beam scanning sonar , Multibeam sonar for ROV navigation and/or mapping (M3), Dual Axis sonar (for long-term seabed or structure monitoring), SAR (Search And Recovery) systems and altimeters.  
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Liquid Robotics Inc

Wave Glider autonomous surface vehicle
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Marine Advanced Robotics

Marine Advanced Robotics supplies the Wave Adaptive Modular Vessel (WAM-V) - an innovative class of Uncrewed Surface Vessel (USV) using unique suspension technology to radically improve seagoing capabilities. The articulating system uses springs, shocks and ball joints to minimise structural loading. The result is an ultra-light vessel that can perform in sea conditions where an ordinary boat of similar size could no longer operate. The incredibly shallow draft and the arch structure contribute to the unique gantry crane functionality.
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Marshall Underwater Industries 

Underwater-pluggable electrical connectors.

MARTAC

Maritime Tactical Systems is an innovator in the development and manufacture of maritime unmanned systems. MARTAC offers a wide range of unmanned vessel systems and solutions to the military and commercial markets.
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McLane Research Labs Inc

Time-series oceanographic profilers, samplers and glass or steel flotation

Mooring Systems International

Mooring design, coring products, surface buoys, bottom mounts, ladder and track style mounts, instrument frames and ADCP buoys, MOBY Science buoy

Ocean Tools Ltd

ROV & IRM sensors and equipment (CP probe, temperature probe, underwater switch, pan & tilt unit, altimeter, gyrocompass, guide wire anchor, etc); Laser measurement systems (C-Gauge & C-Scan) ; Video & optical products (HDO video overlay, image enhancer, subsea display). 

PMI Industries Inc.

Subsea cable hardware to prevent equipment and cable damage: Evergrip, Dyna-Grip, Cable-Grip, Stopper-Grip, Dyna-Hanger, DAM/BLOCK

PIPA - Pipe Inspection Products & Accessories

Leak detection in pressurised in water, gas and oil pipelines. Detection of leaks in all pipe materials in all pipes types from 100mm diameter and above. The unique microphone magnifies all acoustic patterns to detect leaks that other current market products cannot identify.
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RJE International

Acoustic pingers and receivers, Diver Navigation, Diver communication, Diver Sonar, VDR Beacons.

Rochester Cable

Underwater cables for harsh applications: electro-optic tow cables, side-scan sonar tow cables, CTD & instrumentation cables, multiconductor instrumentation cables, coaxial cables, armoured cables, umbilical cables, etc.

Saab Seaeye

All-electric ROVs (Remotely Operated Vehicles): Falcon, Tiger, Lynx, Cougar-XT/XTi, Panther-XT/XT Plus, Leopard, Jaguar, Sabertooth. 
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Seacon

Underwater connectors and system solutions, including wet and dry-mate electrical, optical and hybrid connectors and penetrators but also ROV-mateable and explosion-proof connectors.

Severn Marine Technologies - ClearSignal

Antifouling Coating. A clear non-toxic rubber like permanent coating that resists bio fouling as a result of the non-stick properties of the material itself. 

Sidus Solutions

Surveillance and hazardous location cameras, Explosion proof camera systems, Green lasers, Pan & Tilt devices

Scorpion Oceanics

Poly-U kits

Souriau

Connectors: SOURIAU, JUPITER, BURNDY, M Series
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Subconn

Underwater connectors

SUEX

The Submarine Exploration Company - represents the cutting-edge technology of underwater mobility. Performance, reliability, manoeuvrability, complete product range and the excellent after-market service are the cornerstones that make Suex undisputed leader in the underwater diver propulsion market.

SUEX Diver Propulsion Vehicle

Teledyne Benthos 

Acoustic Modems, Acoustic Releases, Hydrophones, Pingers & locators. 
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Teledyne BlueView

High resolution 2D and 3D multibeam imaging sonars, including the M-Series 2D multibeam imaging and navigation sonar, 3D multibeam profilers and 3D mechanical scanning sonar.
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Teledyne Bowtech

Underwater and harsh environment cameras, lights, strobes and pan & tilt units.
Includes high-definition, zoom, wide-angle, explosion-proof camera options as well as industry-reference LED ROV lights and floodlights. xenon strobes and subsea pan & tilt units.
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Teledyne Caris

CARIS leads in the development of marine GIS software. CARIS offers an effective solution from the processing of the sonar ping to the creation and distribution of charts and data. Contact Mark Hegarty for further information

Teledyne CDL

Subsea inertial navigation systems and motion sensors, including industry-reference gyro systems (TOGS, etc), tilt systems and subsea displays. 

Teledyne Impulse

Underwater connectors and Marine Interconnect Solutions, including rubber moulded GRE connectors, IE55 metal shell electric connectors, wet-mateable metal shell Titan connectors and Ethernet connectors and proximity switches.
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Teledyne Oceanscience

Z-Boat (remotely-operated survey boat), seafloor platforms for ADCPs and instruments, CTD systems, rapidCAST automated underway profiling system.
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Teledyne Odom Hydrographic

Single beam echo sounders, Multibeam echo sounders, Velocimeter.
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Teledyne RD Instruments

-      ADCPs (Acoustic Doppler Current Profilers) for marine and water measurements, including the industry-reference Workhorse Sentinel, Monitor and Long Ranger but also the RiverRay, RiverPro and StreamPro,
-       CTDs (Current/Temperature/Depth sensors): Citadel series
-       DVLs (Doppler Velocity Logs) for ROVs and subsea applications: Navigator, Explorer and Pioneer DVLs
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Teledyne Reson