Cruise inventory

RRS Challenger CH142

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH142
Cruise period1999-04-19 — 1999-05-19
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnGovan, United Kingdom
PurposeResearch
ObjectivesA two-leg cruise (mid-port call, Galway 6-7 May 1999). Leg 1: To study benthic communities on the Porcupine Abyssal Plain. Leg 2: To study benthic communities in the Porcupine Seabight.
A) To continue time-series sampling of benthic organisms (microbiota to invertebrate megafauna) started in 1989 at a locality centred on 48° 50'N, 16° 30'W.
B) To sample other sites at a similar depth, up to 200 nmiles distant, to see how applicable the results at 48° 50'N, 16° 30'W were to the whole Abyssal Plain.
C) To image and sample coral communities on large carbonate mounds in the north and northeast of the Porcupine Seabight.
D) To sample and image soft-sediment benthos on the Continental Slope.
Chief scientistDavid S M Billett (Southampton Oceanography Centre)
ProjectContinuation of BENGAL project but not funded by the EU
Cruise reportRRS Challenger CH142 cruise report ch142_99.pdf — access key 'C' (1.98 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificPorcupine Abyssal Plain; Porcupine Seabight
Track chartsRRS Challenger CH142 cruise track — trk4353.html
Measurements 
Biology and fisheries 
ZoobenthosQuantity: number of stations = 3
Description: Semi-balloon otter trawls - single warp 8.6m width (14m headline) - Porcupine Seabight
ZoobenthosQuantity: number of stations = 11
Description: Wide area survey photography (WASP) - Porcupine Seabight
ZoobenthosQuantity: number of stations = 9
Description: Multicorer - Porcupine Abyssal Plain
ZoobenthosQuantity: number of stations = 7
Description: Semi-balloon otter trawls - single warp 8.6m width (14m headline) - Porcupine Abyssal Plain
ZoobenthosQuantity: number of stations = 1
Description: Epibenthic sledge - photosledge mode - no net, but with video and still cameras
ZoobenthosQuantity: number of stations = 3
Description: Anchor dredge - coral mounds - Porcupine Seabight
ZoobenthosQuantity: number of stations = 5
Description: Multicorer - Porcupine Seabight
ZoobenthosQuantity: number of stations = 2
Description: USNEL box corer - Porcupine Seabight
ZoobenthosQuantity: number of stations = 1
Description: Epibenthic sledge with mesh net, video, still camera
Geology and geophysics 
Bottom photographyQuantity: number of stations = 11
Description: Wide area survey photography (WASP) - Porcupine Seabight
Moorings, landers, buoys 
Chemical oceanography 
Other chemical oceanographic measurements48° 57' 59" N  16° 24' 59" W — Lander - oxygen/DOC/CO2 fluxes across sediment water interface - 2 deplyments: 46 hour and 60 hour
Biology and fisheries 
Zoobenthos48° 58' 59" N  16° 24' 59" W — Bathysnap time-lapse photography deployed - to be recovered in 2000
Zoobenthos49° 0' 0" N  16° 12' 59" W — Bathysnap time-lapse photography - recovered - laid on Discovery cruise 231, March 1998
Geology and geophysics 
Bottom photography49° 0' 0" N  16° 12' 59" W — Bathysnap time-lapse photography - recovered - laid on Discovery cruise 231, March 1998
Bottom photography48° 58' 59" N  16° 24' 59" W — Bathysnap time-lapse photography deployed - to be recovered in 2000
In-situ seafloor measurement/sampling48° 57' 59" N  16° 24' 59" W — Lander - oxygen/DOC/CO2 fluxes across sediment water interface - 2 deplyments: 46 hour and 60 hour