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Underwater
submerged in water.
See Also: Water, Water Quality, Water Meters, H2O, Wastewater, Water Spray, Water Leak, Water Flow, Sea, Subsea
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Harness Design and Manufacture
When designing an underwater cable harness, there are some factors which need to be considered, and we have produced the following list as a guide for customer information:Component considerations:- Electrical requirements- Mechanical considerations- Quality requirements- Reliability- Design redundancy (contact count)- Connector selection (type and form)- Locking requirements- Backpotting requirements- Waterblocking in moldings- Cable specification- Cable jacket material and compatibility with elastomers- Abrasion resistance- Stiffness profile at termination- Connector format (straight or right angle)- Molding format (straight or at an angle)- Clearance allowance for molding and cable routing- Elastomer compatibility (eg oil filled units)- Metalwork selection re: corrosion and cathodic delamination- Surface finish for metalwork as appropriateOperational considerations:- Operating depth profile (not just max. depth)- Tensile loads- Torsional loads- Bending loads- Bend control requirements (to limit bending at termination)- Deployment and recovery loads- Dynamic loading-Flow turbulence effects.
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Wave Profiler
The Wave Profiler allows the user to measure non-directional wave parameters continuously for long periods of time with high temporal and spatial resolution in deeper water from the safety of an underwater mooring. The instrument is particularly useful for clients who need to measure long-period waves (such as rogue waves or infra-gravity waves), waves in wash and in wakes, and non-linear waves.
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Hydrophones
Piezo is a critical element in producing a hydrophone for military and commercial underwater listening applications. Hydrophones utilize piezoelectric elements to detect sound pressure waves produced by underwater vessels, animals, and the environment. Hydrophones must have a flat frequency response that is proportional to the magnitude of the sound pressure wave. CTS piezo elements provide this critical function in hydrophones by providing excellent frequency response and high coupling factors necessary in hydrophone applications. CTS materials provide excellent electrical properties for hydrophone applications while allowing the ability to form the piezo element to the desired mechanical structure for the hydrophone.
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Shallow Water Ice Profiler
The Shallow Water Ice Profiler (SWIP) is a real-time acoustic ice thickness measurement (ice draft) instrument for shallow water applications. The underwater components include a low-cost acoustic transducer, a tilt sensor, a high-precision pressure sensor and a temperature sensor, all providing suitably high resolution for shallow water measurements.
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Underwater Metal Detector
5000
Littlemore Scientific Engineering Co
Robust diver held detector capable of operation to 200 Meters (660ft).Supplied ready for use with rechargeable battery, clacker earphone, standard 25cm coil, mains charger and user manual.
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Rechargeable Submersible Strobe up to 4,000m
ST4K
The Teledyne Bowtech ST4K, Xenon rechargeable submersible strobes are self-contained, compact, high intensity xenon beacons designed for use as a visual aid to locate submersible vehicles, or instrumentation packages when they surface for recovery. They can also be used to mark underwater objects, vehicles, divers or work sites.
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Glass Reinforced Epoxy (GRE) Connectors
Waterproof, submersible electrical connectors rated up to 20,000 psi. Specifically designed for harsh environments, the GRE connectors from Teledyne Impulse are rugged and reliable connections for ROVs, AUVs, underwater instrumentation, and others areas of high pressure or extreme conditions.
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Stock cables
The MacArtney Group depends on the support of a number of major cable manufacturers to supply a range of cables that are designed, manufactured and tested to meet the highest demands of the underwater technology industry. The product range includes TV, signal, instrumentation, fibre optic, ROV, oceanographic geophysical, telecommunication, fishery and sonar cables.
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Acoustic Transducer
RESON TC 1037
Originally designed for underwater telephone systems, the TC 1037 is a rugged directional transducer ideal for operating at low frequencies.
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Underwater LED Lights, 2100 or 3200 Lumens
LED-K-Series
The Teledyne Bowtech LED-K-SERIES lights are available with either 2,100 or 3,200 lumens output and various colour temperature options.
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Camera Option for Nosecone Module
The Point Grey Grasshopper digital camera provides high resolution, high sensitivity sensors, yielding optimal imaging for underwater photography. Housed in the nosecone, the camera takes photos at a rate of up to 3.5 frames per second. Images are stored on a compact flash card and can be viewed through the Gavia Control Centre.
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Sea
General Dynamics Global Imaging Technologies
Our maritime solutions are trusted above and below the open sea to address next-generation challenges. From secure communications to complex weapons systems, underwater vehicles to electronic warfare, our innovations equip the U.S. Navy, Coast Guard and maritime communities with a vast array of advantages to protect the freedom of the seas.
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Underwater Hydrophones
Piston hydrophone
A circular plane piston, immersion hydrophone for measurements in the frequency range 100 kHz to 1 MHz. Code ML4X50.
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Inspection Class ROV
Phantom® L Series
THE PHANTOM® L6 IS THE NEWEST IN THE NEXT GENERATION OF PROVEN, RELIABLE UNDERWATER ROBOTICS PIONEERED BY DEEP OCEAN ENGINEERING IN ITS MANUFACTURE OF REMOTELY OPERATED VEHICLES (ROV), BUILT IN THE USA FOR NEARLY FOUR DECADES.
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Modular Connectorized Distribution Unit
MCDU
The Modular Connectorized Distribution Unit (MCDU) is a modular family of factory-qualified subsea distribution units that provide oil-filled, pressure-balanced junctions for flexible underwater configurations.A new configuration has recently been introduced with a lighter, more cost-effective frame, highly visible ROV lifting handles, and wide openings to facilitate installation and removal of the housing. The compact frame design negates the need for lifting wires, making it easy for ROVs to install and retrieve the unit from the sea floor.
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Underwater Quantum/PAR Sensors
Photosynthetic radiation is essential for the growth of the photosynthetic organisms such as corals. The wavelength range from 400 to 700 nm is PAR (Photosynthetically Active Radiation) or PPFD (Photosynthetic Photon Flux Density). Apogee quantum/PAR sensors are calibrated to measure the number of photons of light across this range.
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Wide Angle High Definition Underwater Camera
Surveyor-WAHD
The Surveyor-WAHD underwater camera is designed to provide a 14% increase in angle of view, from the previous WAHD camera, whilst remaining compact and very competitively priced. It is ideal for ROV inspection tasks, scientific observation and broadcast applications.Video output is available as component (Y/PbPr), utilising standard connectors or HD-SDI on hybrid 75 Ω coaxial or fibre optic connectors, a composite video output is also available.
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PDS Slope Protection Software
A number of special features are implemented in Teledyne PDS for underwater slope protection purposes.Guidance features are used to position a work vessel and monitor the laying of slope protection material. 3D images and 3D views display all movements of the vessel, crane, and the slope protection system.
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Miniature High Resolution Underwater Color CCD Camera
L3C/LCC-720-L
The Teledyne Bowtech L3C/LCC-720-L miniature high resolution underwater colour CCD camera (with six integral high intensity LEDs) provides a low cost solution to general underwater viewing and observation, down to 1,000, 4,000 or 6,000 metres in confined spaces.
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Sonar systems
For surface ship applications Ultra has developed a comprehensive, fully-integrated sonar system, comprising both on-board sonars such as hull-mounted and towed arrays. This modular system fuses data from own-ship and off-board sensors to build a complete underwater tactical picture delivering a bi-static sonar capability.
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Pocket-size pressure logger
DEFI2-DHG & DEFI2-D
DEFI2-DHG and DEFI2-D are miniature pressure recorders (depth meters) for long-term observations (DEFI-D and DEFI-DHG are up to 573 days and 52 days respectively and for 1 minute interval observation). These two recorders can be used attached to fishing nets, underwater instruments and moorings. Also, AAA alkaline batteries used by DEFI-DHG and DEFI-D are easily available, reducing the operating costs.
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Mechanical Coating Thickness Gauge
211
This is one of the most popular mechanical coating thickness gauges in the world.Factory calibrated - with user calibration adjustmentFoils supplied to check calibration on siteIdeal for cold surfaces and underwater useSmall and portable with an accuracy ±5%The “V” grooved base, ideal for pipeline inspectionAvailable in either Metric or Imperial versions, the Elcometer 211 measures coatings up to 6mm (250mils)
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Reef DRIFTER
The unique semi-submerged design can be used in shallow areas that can not be studied with drogue drifters. This drogueless shallow water drifter follows surface currents and resists being caught up on reefs or other underwater obstructions.
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Acoustics
Chelsea Technologies specialises in the design of underwater transducer technology. With over 45 years’ experience, our comprehensive range of standard transducers are ideal for a wide range of applications from aquaculture to defence. Our in-house acoustics experts can also help with custom products and design projects.
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Hydrophone
RESON TC 4014
The TC4014-5 broad band spherical hydrophone offers a very wide usable frequency range with excellent omnidirectional characteristics in all planes. The overall receiving characteristics makes the TC4014-5 an ideal transducer for making absolute underwater sound measurements up to 480kHz. The wide frequency range also makes the TC4014-5 perfect for calibration purposes, particularly in higher frequencies.
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Underwater Color Zoom CCD Camera
Surveyor-SD
The Teledyne Bowtech SURVEYOR-SD underwater colour zoom camera utilises CCD technology, delivering exceptional picture quality, with a 28:1 optical zoom lens and a horizontal resolution of 670 TV lines, all within a 4,000 (or 6,000) metre rated high quality titanium housing, with a 99.7% optically clear sapphire window.
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PXIe-4480, 1.25 MS/s, 3.4 Hz AC/DC-Coupled, 6-Input PXI Sound and Vibration Module
784277-01
1.25 MS/s, 3.4 Hz AC/DC-Coupled, 6-Input PXI Sound and Vibration Module—The PXIe‑4480 is designed for high-bandwidth audio, acoustic, and vibration measurements. It provides six channels of dynamic signal acquisition, and you can use one of four gain settings to configure your input range. The PXIe‑4480 also includes software-configurable AC/DC coupling, charge measurement, voltage excitation, IEPE excitation, and TEDS support, making it ideal for measuring acoustic transducers, pressure sensors, and hydrophones. Common applications include audio test; noise, vibration, and harshness (NVH) analysis; and underwater acoustic measurements. For measuring sudden changes, such as high speed blast and pressure events, the PXIe-4480 can sample up to 20 MS/s per channel in time-domain mode.
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FlowQuest Acoustic Current Profilers
FlowQuest is a line of Acoustic Current Profilers manufactured by LinkQuest Inc., a company renown for its innovation, capability and product quality. The FlowQuest current profilers are ideal for measuring currents and flows in oceans, harbors, lakes and rivers. With its capability for significantly longer range, standard deepwater depth rating and seamless integration with third-party sensors and LinkQuest acoustic modems, the FlowQuest system is not just a current profiler. It also serves as a focal point for your underwater deployments.
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Underwater Thickness Meter
Multigauge 3000
Large bright 10mm display. Integral battery with 55 hours runtime. Can be easily upgraded to a topside repeater. 500m depth rating.
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Small Tide Recorder
miniTIDE
The Valeport miniTIDE is a small Tide Recorder, designed for short-term underwater deployments, ideal for academic studies.
