RRS James Cook JC060
Cruise summary report
|Ship name (ship code)||RRS James Cook (740H)|
|Cruise period||2011-05-09 — 2011-06-12|
|Port of departure||Govan, United Kingdom|
|Port of return||Govan, United Kingdom|
|Objectives||The main aim of cruise JC060 was to carry out habitat mapping work in selected areas of the Rockall Trough, Rockall Bank and Hatton Basin in order to assess the status of different benthic habitats in relation to human activities, especially deep-sea bottom trawling. The cruise included a revisit of the Darwin Mound cold-water coral reefs, discovered in 1998 and protected in 2003, and an assessment of the status of two fisheries closure areas on Rockall Bank. In addition, two pilot studies of a more geological nature were carried out as well: one was targeting a Polygonal Fault System in the Hatton Basin, potentially linked to fluid flow, while the other focused on the history of the Rockall Bank Mass Flow.
The tools used to achieve these objectives included the Autosub6000 Autonomous Underwater Vehicle (AUV), newly equipped with an EdgeTech dual frequency high-resolution sidescan sonar plus chirp profiler and a monochrome stills camera, a commercial inspection class ROV, and more traditional equipment including piston-, mega- and boxcore, CTD and shipborne multibeam (EM120 and EM710).
Although the unsettled weather hampered the operations to a certain extent (including a forced return to the shelter of the Minches, resulting in an ad hoc survey of the E Shiant Bank), the cruise was a success, with 88h of ROV footage & photography collected, 125km2 of seabed mapped at high resolution (metre to centimetre-scale) by the Autosub6000, 400km2 mapped with the EM710 on Rockall Bank, and 52 coring operations for geological and biological studies.
The first results of the cruise stress again the importance of a sound management of the marine realm, including the deep ocean, and underline the continuous need for detailed information and high-resolution data to underpin such management.
|Chief scientist||Veerle A Huvenne (National Oceanography Centre, Southampton)|
|Cruise report||(16.63 MB)|
|General||North East Atlantic Ocean (limit 40W)|
|Specific||Rockall Trough, Rockall Bank and Hatton Basin.|
|Track charts||(0.17 MB)|
|CTD stations||Quantity: number of profiles = 5|
Description: CTD casts
|Other physical oceanographic measurements||Quantity: number of profiles = 5|
|Geology and geophysics|
|Core - soft bottom||Quantity: number of cores = 19|
Description: Boxcores for macro & megafauna.
|Core - soft bottom||Quantity: number of cores = 15|
Description: Piston cores
|Core - soft bottom||Quantity: number of cores = 18|
Description: Megacores for macrofauna.
|Bottom photography||Quantity: number of dives = 26|
Description: ROV dives
|Geophysical measurements made at depth||Quantity: number of dives = 11|
Description: Autosub6000 AUV missions
|Multi-beam echosounding||Quantity: survey square kilometres = 400|
Description: EM710 multibeam data
|Moorings, landers, buoys|
|Biology and fisheries|
|Other biological/fisheries measurement||59° 48' 39" N 7° 23' 4" W — Anchored marker bouy at ca. 5m above seabed to mark start of video transect for future seabed monitoring.|
|Other biological/fisheries measurement||59° 50' 56" N 7° 3' 32" W — Anchored marker bouy at ca. 5m above seabed to mark start of video transect for future seabed monitoring.|
|Other biological/fisheries measurement||59° 51' 5" N 7° 8' 3" W — Anchored marker bouy at ca. 5m above seabed to mark start of video transect for future seabed monitoring.|
|Other biological/fisheries measurement||59° 48' 52" N 7° 21' 32" W — Anchored marker bouy at ca. 5m above seabed to mark start of video transect for future seabed monitoring.|