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Purser, Autun; Boehringer, Lilian; Hehemann, Laura; Hoge, Ulrich; Merten, Veronique; Dreutter, Simon (2021): OFOBS Seafloor images from the Svalbard Archipelago and Fram Strait, collected during RV MARIA S. MERIAN expedition MSM95 (GPF 19-2_05). PANGAEA, https://doi.org/10.1594/PANGAEA.928815

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Abstract:
During the RV MARIA S. MERIAN cruise to the Svalbard Archipelago and the Fram Strait during September - October 2020 the Ocean Floor Observation and Bathymetry System (OFOBS) was used to collect still and video images, as well as sidescan data, from various locations surveyed during the research cruise.
The OFOBS system consisted of a towed underwater camera system equipped with both a high-resolution photo-camera (iSiTEC, CANON EOS 5D Mark III) and a high-definition video-camera (iSiTEC, Sony FCB-H11) as well as an integrated sidescan sonar system. The cameras were mounted on a steel frame (140L x 92W x 135H cm), together with two strobe lights (iSiTEC UW-Blitz 250, TTL driven), three laser pointers spaced with a distance of 50 cm used to estimate the size of seafloor structures, four LED lights, and a USBL positioning system (Posidonia) to track the position of the OFOBS during deployments, with additional positioning information provided by the integrated INS and DVL systems.
In automatic mode, a seabed photo, depicting an area of approximately 4 m², with variations depending on the actual height above ground, was taken every ~15 seconds to obtain series of "TIMER" stills distributed at regular distances along each of the survey profiles. Profile lengths varied in length depending on duration of the cast, usually determined by sea state conditions at time of survey. At a ship speed of 0.5 kn, the average distance between seabed images was approximately 5 m. Ship speed was however greatly influenced by ice conditions. Additional "HOTKEY" photos were taken from interesting objects (organisms, seabed features, etc) when they appeared in the live video feed.
Keyword(s):
deep sea ecology; fishing; Fram Strait; Hausgarten; Svalbard; trawling
Coverage:
Median Latitude: 78.019874 * Median Longitude: 9.250331 * South-bound Latitude: 76.334097 * West-bound Longitude: 4.125227 * North-bound Latitude: 79.599635 * East-bound Longitude: 15.026450
Date/Time Start: 2020-09-19T00:00:11 * Date/Time End: 2020-10-01T02:38:15
Size:
15 datasets

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Datasets listed in this publication series

  1. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_15-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928794
  2. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_18-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928798
  3. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_20-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928799
  4. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_21-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928800
  5. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_22-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928803
  6. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_25-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928806
  7. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_27-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928807
  8. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_30-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928809
  9. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_31-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928812
  10. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_34-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928813
  11. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_38-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928816
  12. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_42-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928814
  13. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_43-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928793
  14. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_46-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928788
  15. Purser, A; Boehringer, L; Hehemann, L et al. (2021): Seabed photographs taken along OFOBS profile MSM95_52-1 during RV MARIA S. MERIAN cruise MSM95. https://doi.org/10.1594/PANGAEA.928755