Category:Photographs Relating to the 1974 Deep-Sea Red Crab Survey
US National Archives identifier 7348294
The Northeast Fisheries Science Center created these images for a deep-sea red crab population survey and for use in agency publications.
"The original analog images in this series were captured by a unique photographic system comprised of an underwater 70mm camera, stroboscopic light, and battery pack mounted to a steel Towed Underwater Benthic Sled (TUBS). At selected NOAA offshore sampling stations, the TUBS was deployed and then towed at 1 to 2 knots across the ocean floor. Each deployment (tow) was assigned a number based on the station identification. Tow durations ranged from 30 to 75 minutes with the camera programmed to take a photograph every 10 seconds. The digital images in this series are from an agency scanning project completed in 2011. Please note that not all frames found on the original film were scanned."
"This series consists of color and some black-and-white photographs from a red crab survey conducted in the continental slope waters off the northeastern United States. The survey was taken from the National Oceanic and Atmospheric Administration (NOAA) research vessel Albatross IV during cruise 74-7. Images in this series were taken utilizing an underwater camera-sled in water depths between 250 to 1,485 meters located offshore from Maryland to the eastern end of Georges Bank. Offshore sampling station locations identified include areas in proximity to Martha's Vineyard, Long Island, Nantucket, and New Jersey. Included in this series are views of red crabs in their natural habitat, bottom topography and sediments, burrows in the substrate, and various species of invertebrates and fish. In addition, images include indicators for the tow number, time of day, and frame number."
