The biennial Alaska Fisheries Science Center's (AFSC) Gulf of Alaska (GOA) bottom trawl survey are an integral component of stock assessments and management of fishes and crabs in the region. However, the image set was used for deep sea coral and sponge identification and annotation. Each transect was 15 minutes long with a vessel speed close to 1 knot. The lowered stereo camera system (LSC) was kept within 1 m of the bottom during the transect. The start of each transect was haphazardly chosen. Most transects took place at night. The LSC system consisted of two parallel-mounted machine-vision cameras spaced approximately 30 cm apart in underwater housings connected via ethernet cables to a computer in a separate underwater housing enclosed in a protective aluminum cage. A monochromatic/color camera pair was used with image resolution. The monochromatic camera (Point Grey, BFLY-PGE_50S5M) collected images at 5.01 megapixels, and the color camera (Point Grey, BFLY-PGE_50S5C) collected images at 5.01 megapixels. Four high intensity strobe LED illuminators provided lighting and were activated at the surface when the camera unit entered the water and deactivated at the end of the deployment when the unit returned to a depth of approximately 10 m. Each strobe was constructed of two Cree CXB3590 arrays capable of producing 25,000 lumens at 200 W. The computer, cameras, and lights were powered by a 28 V NiMH battery pack. Synchronous images were recorded at a frequency of one image per second. Images were processed with software that allowed direct measurements to be made from calibrated stereo camera images.

This dataset contains oceanographic data (ADCP, CTD, underway), submersible data, images, and documentation. The cruise focused on several seep sites, canyons, and hard bottom features located less than 100 nm offshore. The goal of this expedition was to validate several seep targets, image and map seeps, canyons (e.g., Keller, Pamlico, Hatteras, and unnamed canyons), and hard bottom features located between Virginia and Georgia.

This cruise used the remotely operated vehicle (ROV) Jason II to: explore 4-6 new sites for the occurrence of deep water coral reefs; made collections of Lophelia and other corals for genetic and physiological studies, made collections of communities associated with Lophelia and other corals for ecological studies; collected quantitative digital imagery for characterization of sites and coral communities; collect spatially explicit physical near bottom oceanographic data; deploy cameras and microbial arrays; reposition larval traps and current meters; collected push cores; and conducted a series of linked archaeological/ biological investigations on deep water shipwrecks.

The U.S. Geological Survey (USGS) Remote Sensing Coastal Change (RSCC) and Processes Impacting Seafloor Change and Ecosystem Services (PISCES) projects collect underwater imagery of coral reefs and other scientifically interesting, submerged environments using the novel SfM (Structure-from-Motion) Quantitative Underwater Imaging Device with 5 cameras (SQUID-5) system. This sensor collects imagery with optimized endlap/sidelap and precise position information to create high-resolution orthomosaics, three-dimensional (3D) point clouds, and digital elevation/surface models (DEMs/DSMs) using SfM photogrammetry methods. These products are valuable for measuring submerged topographic and ecological change, and for understanding reef vulnerability and response to disturbance events. This is an ongoing collection of underwater imagery surveys of coral reefs and other clear water environments. Shallow water (approximately 2-10 meters [m] depth) digital imagery is acquired using the "SfM Quantitative Underwater Imaging Device with 5 cameras" (SQUID-5) towed surface sensor system. The system consists of five synchronized rigidly connected downward-looking digital cameras with overlapping views of the seafloor, along with a custom integrated survey-grade Global Navigation Satellite System (GNSS) receiver.

이 데이터셋의 설명이 없습니다

The 2004 Gulf of Alaska Seamount Expedition will use the deep submergence vehicle (DSV) Alvin to explore five large seamounts. Giacomini, Pratt, Welker, Denson, and Dickens seamounts stretch over a 400-nautical-mile section of the northeast Pacific, called the Kodiak-Bowie Seamount Chain. Operating from a base aboard R/V Atlantis, scientists will dive to depths of up to 3,500 m to conduct a series of biological and geological investigations on these ancient volcanoes. All four of the Principal Investigators aboard this cruise were part of the Gulf of Alaska Seamount Expedition in 2002, as were other scientific researchers, many of the ship's crew, the sub's crew, and the cruise coordinator. The research foci of this mission include: - Geologic dating and characterization of the seamounts - Deep-sea coral distribution and genetics - Community ecology of deep-sea corals - Investigation of the microbial, invertebrate, and fish communities associated with the corals

This dataset contains video products from R/V Atlantis and Alvin submersible from the first leg of the Gulf of Alaska 2002 Expedition headed north from Astoria, Oregon, to study several unexplored seamounts in the Gulf of Alaska to understand how they formed and determine their historic history. Additional operations included species collection, habitat characterization, and studies of benthic community structures.

This dataset contains video products from R/V Atlantis and Alvin submersible from the first leg of the Gulf of Alaska 2002 Expedition headed north from Astoria, Oregon, to study several unexplored seamounts in the Gulf of Alaska to understand how they formed and determine their historic history. Additional operations included species collection, habitat characterization, and studies of benthic community structures.

This dataset contains oceanographic data (ADCP Lander, Chemical, CTD, ROV, SCS), biological images and videos, and documentation. This project involves a comprehensive multidisciplinary study to explore and characterize two deep coral habitats with contrasting benthic communities on the west Florida slope of the Gulf of Mexico, including the testing of newly developed sensors deployed on an ROV to map and fully resolve the carbonate system at the sites.

This dataset contains video products from NOAA Ship McArthur and Human Occupied Vehicle DeepWorker 2000 in Monterey Bay from 1999-05-09 to 1999-05-22. This expedition is the third cruise in the National Marine Sanctuaries 1999 field season which is part of the 5 year Sustainable Seas Expeditions. Together, the Sustainable Seas projects focus on underwater exploration and discovery of the marine world with special emphasis on the national marine sanctuaries of the United States.