The An ROV Is Making Incredibly Detailed Maps of the

By | March 28, 2021

About 20 miles (32 kilometers) off the California coast, the 10,500-pound (4,7630 kg) remote submersible Doctor Rickets swept his strobe lights and sonar pulses into the seafloor like a transform silent disco. The vehicle was not merely putting on a show for the deep sea of ​​the Pacific Ocean. It was mapping the terrain and ecology of a geological formation 2,600 feet (793 m) below the surface of the sea.

Dock ricketts were a device by which a human team from the Monterey Bay Aquarium Research Institute researched the seafloor, assessing its bathrooms and rich ecology.

“Our goal is to efficiently map bentic habits on a scale of centimeters over complex terrain,” Dave Carres, a principal engineer at MBARI and head of the seafloor mapping team, said in the email. “We can currently cover the area around [110 yards to 165 yards or 150 meters to 100 meters] in a single 10-hour ROV pive. To achieve efficiency in really large surveys, we Eventually an autonomous underwater vehicle hopes to bring this sensor package into the field. ”

An unheard run of rock in the lower part of the Pacific Ocean was the subject of Sur Ridge. Thought that during the Cretaceous period, the submarine ridge is a combination of sedimentary and metamorphic rock. It is about the size of Manhattan and is the subject of an MBARI investigation for over 20 years. At a distance of approximately 1,600 feet (488 m) above the mud-filled plains around the structure, the Sur Ridge Ridge is taller than the Empire State Building in parts, although the peaks and valleys within it have their own geography. More recently, the focus of research has been on the ridge as a biodiversity hotspot; It has been found to host more than 250 different species, and the team was inspecting a section of verandah exclusively in corals and deep-sea sponges.

For recent work, the team designed dock rickets with LIDAR laser scanners, sonar systems, cameras, and undercarriage lights of the vehicle. LIDAR is a technique commonly used in aerial archeology and mapping terrestrial ecosystems such as the rainforest. The system works by shooting laser pulses at a target area, and creates a topographic map of the area based on the time it bounces back to each pulse. The deep sea presented a technical challenge to the efforts of researchers, however, not only for LIDAR, but also other forms of surveillance.

“Simply put,” Keres said, “what we’re trying to do is technically very difficult, not least because we want to operate electronic equipment under great pressure in a corrosive, electrically conductive medium.” . ”

The team conducted a nested survey, meaning that they looked at the biodiversity hotspot of Sur Ridge in high resolution along each ridge. Taking the information gathered together, the team created a large dataset describing hotspots, ranging from thick sections of the topography of the bedrake to the structure and shape of corals downstream to more stable lifespans. Other life compliance was low.

“We found that the ROV was looted by sablefish, which increased in number as the survey moved forward,” Carras said. “The problem was that the fish went under the ROV, got in the way of cameras and lidars and dumped so much mud that they ruined the survey data. We eventually decided that Sablefish was being attracted by the strobe lights used for our photography. ”

Last year, the Ricketts submarine was deployed with a laser system that allows MBARI researchers to better understand the mucous structures provided by the ether, gelatinous larvacans, living off the coast. Recent 3D-reconstructions of Sur Ridge were possible to triumph over equipment delivered to sonar, which detects everything that does not detect living things, and soft tissues such as LIDAR and photography. After seizing the seafloor at a resolution of less than half an inch, the team was able to reorganize the survey area in sharp relief, beneath the tiniest phalanges of a pink coral fan.

“Once we know where the animals are, we can look at a photomic socks made by stitching together individual photos and assess whether the animal is alive or dead,” Carrie said, and Sometimes determine the species.

Research is important for a variety of purposes, including protecting at-risk ecosystems and finding the best locations to generate wave power to clean the electric grid. According to the United Nations, it is all the more important to understand what is under the waves that roughly 2.4 billion people live within 60 miles (97 kilometers) of the coast. The area, like the water from California, is also home to the huge fisheries, home to the California current that maintains people’s livelihoods but also sustainable management.

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