Mitigating Underwater Noise
;one size fits all’ solution for underwater noise,” said Spence.“However, propeller cavitation is a prominent feature of underwater noise for most commercial vessels. Machinery noise will also play an important role, particularly propulsion engines, gensets, gearboxes, and other large equipment.”When asked define ‘top tips’ to mitigate underwater noise, Spence admitted “Really, I have one. Put a limit in your vessel specification and require the vessel to be designed to meet it. There currently are a variety of underwater noise classifications from ABS, Lloyds
New Fluid Helps Preserve Subsea Equipment
ring gasket profile. After one lengthy cleaning operation or several cleaning operations of shorter duration, there is substantial risk that the liquid-sealing performance or gas-sealing integrity of the well may be permanently damaged, USI said.Another widespread problem is the corrosion of large equipment assemblies and running tools. Large pieces of subsea equipment often retain residual water in the internal bores from pressure testing or condensed humidity, which can cause corrosion and reliability problems. Defender Stasis LT can be used to protect the internals of subsea trees, subsea manifolds
VARD Selects Synapsis INS For an Advanced Research Vessel
System (INS) to an advanced research vessel. VARD Holding Limited, a major global designer and shipbuilder of specialized vessels, with their subsidiary VARD Electro AS, have selected Raytheon Anschütz’ Synapsis INS for a new research vessel. The Synapsis INS is part of a large equipment and electrical installation package, which VARD Electro AS will provide to Cochin Shipyard Ltd. The INS consists of a total of six workstations for chart radar, ECDIS and conning, all connected through a redundant Ethernet-based local area network (LAN). The INS manages all routes and
MTR100: Subsea Global Solutions
Global underwater maintenance and repair service provider Subsea Global Solutions LLC provides maintenance and inspection services as well as large equipment and weld repairs. From in-water surveys, propeller polishing and in-water hull cleaning, to complex class-approved permanent ship repairs (propellers, rudders, thrusters, shell plates, seals), Subsea Global Solutions is a global resource for vessel maintenance and repair diving services, delivering cost effective, efficient solutions in the water as opposed to dry dock The company also provides underwater marine construction services. With a
Fate of Past Oyster Reef Projects Unknown
beaches and coastal developments such as homes and roads. While the popularity of oyster reef restoration has grown, there are questions about both the effectiveness and cost that can only be answered by studying past projects, Blomberg said. For example, when work requires the mobilization of large equipment like barges, how much reef should you build to ensure the project is cost-effective? Do the environmental benefits of restored oyster reefs, like shoreline stabilization and water filtration, scale with the size of the reefs? “If we build a small reef and our goal is to reduce the amount
February 2024
