Fiber Optic News

Photo Credit: Marine Technology Society

#Oi2020 History

In 1976, testing began by the Naval Electronics Laboratory Center of two fiber optic undersea tow cables. This was done to measure “changes in optical attenuation caused by cabling, tension, temperature and pressure,” according to the book Advances in Marine Technology, as published by the Marine Technology Society. The testing led to the six-fiber cable (as manufactured by ITT Electro-Products Division, as the caveat to commence the accuracy of using fiber optics in undersea tow cables.   Marine Technology Reporter has been commissioned to publish the Official “Oceanolo

Photo: MacArtney

MacArtney Supplies Time Saving Solution to MMT

are available via an accessible software user interface.  MacArtney Underwater Technology has been supplying multiplexers to key underwater technology industries for decades. The first MacArtney NEXUS multiplexer, produced in 1999, digitized analogue signals from the depths to the surface via fiber optic cables. In the present day, the NEXUS MK C is MacArtney’s most versatile multiplexer solution, built to meet the customer’s needs

Photo: NOVACAVI

Mooring Cables for LoVe Ocean Observatory

application, these cables had to be conceived and manufactured to fulfil a wide range of data communication systems while guaranteeing the following key features:Breaking strength up to 4400KgReinforced construction with fibers embedded into outer sheathConfiguration for DSL and RS 485 communication Fiber Optic and EthernetWatertightnessPressure, abrasion, & weather resistanceSuitability for constant movement in sea waterEngineering expertise, comprehensive knowledge of materials and a high degree of manufacturing precision enabled NOVACAVI to develop these application-specific cables entirely tailored

Deployment of MacArtney TRIAXUS for vertical profiling (Photo: MacArtney)

MacArtney to Supply Swedish Research Vessel

on an integrated system solution for the new research vessel, the R/V Svea.Working with the Swedish University of Agricultural Sciences (SLU) since 2009, MacArtney has provided a range of technology, from camera and light systems, to more recently, the co-design and upgrade of a Lobster Sledge with fiber optic multiplexer and interfaces.Now MacArtney has delivered a fully integrated scope of supply including the MacArtney TRIAXUS and FOCUS 2 ROTVs (Remote Operated Towed Vehicles) and a customized CTD (Conductivity, Temperature and Depth) carousel with water sampling and drop-camera system comprising

Image: Cable Solutions (Worldwide) Limited

Cable Solutions Manufactures 50km of Bespoke Subsea Cable

to ensure high levels of productivity and durability in harsh offshore environments."The last quarter was especially busy for Cable Solutions, we undertook bespoke cable design and manufacture for a variety of subsea projects, with production runs of 300 to 5000 meters. We were active in fiber optic cable manufacture, supporting projects with more efficient communication and seafloor monitoring," said the company in a statement.The advantages of using fiber optic cables in a subsea environment are well known, with operators leveraging the advantages of improved performance. "We

Image courtesy of the Ocean Exploration Trust/Nautilus Live

#Oi2020 History

Commencing operation in 2000, NOAA’s remotely operated vehicle Argus typically works in tandem with another “workhorse” ROV known as Hercules. As a “tow sled” designation, Argus is suspended at the end of a steel-armored fiber-optic cable that is tethered to NOAA’s E/V Nautilus at the sea surface. Because Argus lacks a buoyancy module and is built of heavy stainless steel, its movements are controlled by moving the ship or raising and lowering the cable. A short 100-foot tether connects Hercules to Argus. By keeping the tether between Argus and Hercules slack

Saab Seaeye’s Sabertooth AUV (Photo from Saab Seaeye)

Seaspace Race Underway at Saab Subsea Docking Demo

use it.“This is the first generation (SDS) and we have learned a lot,” he says. “We’re also looking at how a tooling garage would fit in and last week we tested a new generation connector that’s proposed to be included in the SWIG standard.” It would work with a DC fiber optic umbilical design, which Equinor is starting to use, he says.Plenty more is yet to come. The sea space race is just starting.Read more.(Photo from Saab Seaeye

Images: Modus Seabed Intervention

Flying new Routes Subsea

deployment system or via a subsea garage/docking station, which the vehicle can ‘fly’ in and out of. From the docking facilities, the vehicle can operate as an AUV (without a tether), using onboard batteries, or, where direct control is required, it can operate like an ROV either via a fiber optic tether (which enables very long excursions), or by means of a full power and control umbilical.Instead of being deployed from a dedicated support vessel, the docking station is designed to be deployed to the seabed from a vessel crane. The aim is to use a vessel already engaged at a specific location

Photo: Seamor Marine

SEAMOR: ROV to Last Ice Project in Canada

and Pristine Seas – National Geographic Society).SEAMOR Marine's Chinook ROV has been selected for this mission given its earned reputation as a versatile vehicle that easily pairs with a variety of accessories. This particular model will be equipped with a handheld pendant controller, and a fiber optic tether multiplexer upgrade. These will help control a wide array of on-board instrumentation such as USBL underwater positioning system with GPS integration, the ROV to be tracked in real-world coordinates in real time, and an integrated Tritech Micron Echosounder which permits the ROV to measure

Pioneering Spirit (Photo: Silicon Sensing)

Advanced Tech Helps Guide Pioneering Spirit

trials, precise movement data from Silicon Sensing’s CRH02 all-silicon gyros allowed the ADX XR to deliver a highly accurate and detailed 3- to 5-minute ship course prediction to the pilot. CRH02 is a compact, low noise, single axis gyroscope which provides outstanding performance, similar to a fiber optic gyro, but is more rugged, with a lower size and weight.ADX XR display showing the predicted turn into port (Photo: Silicon Sensing)Following this successful performance, AD Navigation placed a production order for CRH02 gyros with Silicon Sensing.Lorentz Ryan, Managing Director of AD Navigation

Marine Technology Magazine Cover Nov 2019 - MTR White Papers: Subsea Vehicles

Marine Technology Reporter is the world's largest audited subsea industry publication serving the offshore energy, subsea defense and scientific communities.

Subscribe
Marine Technology ENews subscription

Marine Technology ENews is the subsea industry's largest circulation and most authoritative ENews Service, delivered to your Email three times per week

Subscribe for MTR E-news