Rice Electronics’ Post

GREY POWER: "It is the 'digitisation' of equipment, which, it is suggested, is largely responsible for this plethora of warnings, causing such irritation and distraction. It is easy for manufacturers to incorporate them into their equipment, so that is what they do, not admitting for a minute that some alarms are more important than others. The research offers the useful term 'alarm flooding,' which can confuse and lead to poor decision-making. "The calmest individual on earth would surely be at least showing signs of irritation, having to cope with 74 alarms per hour, while wretched engineering staff will sometimes have to cope with 2,500 alarms per day, suffering what has been termed 'alarm fatigue.' "It is reported that some have had to endure peaks of 22,500 alarms per day, which must make for exceedingly irritated watchkeepers. And it doesn’t help the cause of sanity, if all the salient engine room alarms sound, or flash, in panels on the bridge, with unmanned machinery space systems in operation." Full article link in comments.

GREY POWER: "It is the 'digitisation' of equipment, which, it is suggested, is largely responsible for this plethora of warnings, causing such irritation and distraction. It is easy for manufacturers to incorporate them into their equipment, so that is what they do, not admitting for a minute that some alarms are more important than others. The research offers the useful term 'alarm flooding,' which can confuse and lead to poor decision-making. "The calmest individual on earth would surely be at least showing signs of irritation, having to cope with 74 alarms per hour, while wretched engineering staff will sometimes have to cope with 2,500 alarms per day, suffering what has been termed 'alarm fatigue.' "It is reported that some have had to endure peaks of 22,500 alarms per day, which must make for exceedingly irritated watchkeepers. And it doesn’t help the cause of sanity, if all the salient engine room alarms sound, or flash, in panels on the bridge, with unmanned machinery space systems in operation." Full article link in comments.

HOW TO LOCATE AND CHARACTERISE A FAULT ON ACTIVE UNDERSEA CABLES BEFORE ENGAGING REPAIRS Whatever the cause of the damage, fault-finding in a cable that might be as long as the earth’s circumference and 8,000 meters deep in the ocean is no easy task. Cables typically come ashore multiple times along their path and each landing has precision monitoring equipment and devices to watch the vital signs of each segment. To dispatch a repair ship, the cable owner needs to pinpoint the fault’s position as precisely as possible. Spread-spectrum time-domain reflectometry (SS-TDR) is the technology employed to locate and characterize a fault on active cables. Traditional time-domain reflectometry can’t be used on in-use undersea cables due to the presence of high voltages. SS-TDR was originally developed to detect faults in the wiring of airplanes using 400-Hz AC power. It uses modulated pseudo-noise (PN) signals rather than a plain square wave pulse. The signals still bounce off any impedance changes introduced by damage but an algorithm is used to correlate the returned PN codes with what was sent down the fibre, making it easier to make measurements in a noisy environment.     Once a fault is located, the cable has to be raised from the deep sea. Very few cable repairs are executed on submerged cables because it’s just not the right place to open up a cable to work on it. While recovering something as small as a cable from perhaps thousands of meters below the surface seems daunting, knowing exactly where the cable was laid helps. That said, cables damaged by underwater rockslides or trawling accidents could be in a completely different spot than where they were laid, so locating the cable can be challenging. Also, some cable routes are packed with both in-service and obsolete cables. The transatlantic submarine corridor alone has dozens of cables that have to deal with the tricky topography of the mid-Atlantic ridge. While submersibles are sometimes used to identify the precise location of a cable, retrieving it is heavy work that requires heavy equipment. The cable ship travels to a point a couple of nautical miles away from the fault location and travels perpendicular to the path of the cable while dragging a cutting grapnel along the sea floor. The grapnel digs into the seabed until it snags the cable and begins lifting it. As the ship continues winching in the grapnel, the cable is forced against a cutting blade in the crotch of the grapnel, eventually severing it cleanly and completely. The cut ends fall back to the bottom where they await a second pass, this time using a special recovery grapnel. Once the first end of the cut cable is snagged, the ship’s crane winches it aboard so that a recovery buoy can be attached. This buoy marks the location of the first end, making it easier to recover later.

Why SELKIE is perfect for Hydrographic Survey 🔍 SELKIE was created with #survey operations in mind, inside and out. On the software side, the SM300 Autonomous Command and Control that powers SELKIE makes it easy to set low-depth areas and survey grids, as well as full integration with #Hypack and #Qinsy , so you can import pre-planned missions the way you're used to. On the hardware side, SELKIE features Seakeeper gyroscope for data integrity, long-range capability for extended survey missions, and a multibeam flange for equipment options. #SMRSELKIE #Maritime #AutonomousVessel #MaritimeIndustry 

This movie illustrate the concept of using Multibeam Echosounder and Towed Sidescan together, using AI based Automatic Target Recognition (ATR). #OPT #hydrographicsurvey #spectralAI #norbit #klein #lidan

Discussing ROV (Remotely Operated Vehicle) components, we typically refer to several key parts: 1. Frame: The structural foundation of the ROV, usually made of aluminum or composite materials, designed to support all other components. 2. Propulsion System: This includes thrusters or propellers used for movement in water, allowing the ROV to navigate in different directions. 3. Power System: Typically batteries or power cables provide energy to the ROV for propulsion, control, and other onboard systems. 4. Control System: Consists of electronic components, such as a control console or joystick, used by operators to maneuver the ROV. 5. Sensors : Various sensors like cameras, sonars, depth sensors, and other specialized equipment used to gather data about the environment the ROV operates in. 6. Manipulators/Tools: Optional but often included, these are arms or tools attached to the ROV for tasks like sample collection, object manipulation, or maintenance. 7. Communication System: Enables the transmission of commands from the operator to the ROV and relays data back to the operator. 8. Navigation System: Includes gyroscopes, accelerometers, and other instruments to determine the ROV's position and orientation underwater. 9. Buoyancy Control System: Utilizes ballast tanks or adjustable buoyancy devices to maintain the ROV's desired depth. 10. Safety Features: Such as emergency buoyancy devices, fail-safes, and redundant systems to ensure the ROV can safely operate and return to the surface in case of an emergency. These components work together to enable the ROV to perform tasks such as underwater exploration, inspection, maintenance, and research.

ROV Inspection Process At American Tanks, we understand the importance of routine inspections for water and chemical storage tanks to prevent costly damage and ensure operational efficiency. Our ROV (Remotely Operated Vehicle) services allow us to perform high-quality inspections without the need to drain your tanks, saving you both time and money. Our ROV inspection process involves the following steps: 1️⃣ Preparation: We start by tailoring the inspection to meet your specific needs, determining the key areas that need to be checked based on the tank’s design and usage. 2️⃣ Deployment: Using advanced ROV technology, we submerge the vehicle into your tank. The ROV is equipped with cutting-edge cameras and sensors that can reach every corner of the tank, ensuring no area is overlooked. 3️⃣ Data Collection: Our ROV collects critical data in real-time, capturing detailed footage of the tank’s interior, including hard-to-reach areas. This method is non-invasive and allows us to identify any potential issues such as corrosion, cracks, or leaks. 4️⃣ Analysis: Once the inspection is complete, our experts thoroughly analyze the data, providing you with an in-depth report that outlines the condition of your tanks and any necessary maintenance. Why Work with American Tanks? We prioritize safety and efficiency by eliminating the risks associated with traditional tank inspections, which often require confined space entry. Our ROV inspections give you peace of mind, ensuring that your tanks are well-maintained and capable of handling water or chemical storage safely. Reach out today to schedule your ROV inspection with American Tanks and learn more about how we can keep your storage systems running smoothly, all while reducing downtime! #AmericanTanks #ROVInspections #TankMaintenance #ChemicalStorageSolutions #WaterTankSafety #UnderwaterDrones #EfficientInspections #TankIntegrity #IndustrialMaintenance #NoDowntime #TankSafetyFirst

Submarine Cable Map