Cruise inventory

RRS Charles Darwin CD90

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD90
Cruise period1994-09-17 — 1994-09-27
StatusCompleted
Port of departurePonta Delgada, Portugal
Port of returnPonta Delgada, Portugal
ObjectivesTo carry out sea-trials of the new BRIDGE instrument for the detection, investigation and sampling of hydrothermal flumes - "BRIDGET".
Main aims:
1. To pressure-test "BRIDGET" to >3000m water depth.
2. To carry out sensor testing in a known hydrothermal area - the "RAINBOW" vent-field, 36° 15'N, Mid-Atlantic Ridge.
3. To assess the manoeuvrability of the instrument when towed astern of the ship from the deep-tow conducting cable, in a transponder-navigated grid.
4. To obtain inter-calibration within a known hydrothermal plume between "BRIDGET", the RVS CTD-netherlometer-transmissometer array and the OSU "ZAPS" instrumented sled.
Chief scientistChristopher R German (Institute of Oceanographic Sciences Deacon Laboratory)
Project"BRIDGE" Community Research Project
Coordinating bodyNERC (Earth Sciences)
Cruise reportRRS Charles Darwin CD90 cruise report cd90.pdf — access key 'C' (1.43 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Specific"South Amar" and "Amar" segments, 36deg N, mid-Atlantic Ridge (South of Azores triple-junction)
Track chartsRRS Charles Darwin CD90 cruise track — trk4006.html
Measurements 
Physical oceanography 
BathythermographQuantity: number of profiles = 16
Description: XBT drops with T5 and T7 probes. All data relayed to RN Hydrographic Office via RVS Barry.
Water bottle stationsQuantity: number of stations = 2
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre rosette used to collect 2 x 12 bottle profiles for TDMn analysis during CTD up-casts.
Water bottle stationsQuantity: number of profiles = 3
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre Niskin bottles employed to collect 3 x 12-bottle sample suites for TDMn analysis during "BRIDGET" tow-yos through the "RAINBOW" hydrothermal plume.
CTD stationsQuantity: number of deployments = 6
Description: "BRIDGET" lowerings/tow-yos with CTD-nephelometer-transmissometer array through "RAINBOW" hydrothermal area.
CTD stationsQuantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.
CTD stationsQuantity: number of stations = 5
Description: Deep casts using NB Mk III cTD with Seatech transmissometer and Chelsea Instrument Mk II nephelometer. Data collected on down-casts.
Transparency (eg transmissometer)Quantity: number of stations = 5
Description: Deep casts using NB Mk III cTD with Seatech transmissometer and Chelsea Instrument Mk II nephelometer. Data collected on down-casts.
Transparency (eg transmissometer)Quantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.
Transparency (eg transmissometer)Quantity: number of deployments = 6
Description: "BRIDGET" lowerings/tow-yos with CTD-nephelometer-transmissometer array through "RAINBOW" hydrothermal area.
Chemical oceanography 
Trace elementsQuantity: number of stations = 2
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre rosette used to collect 2 x 12 bottle profiles for TDMn analysis during CTD up-casts.
Trace elementsQuantity: number of profiles = 3
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre Niskin bottles employed to collect 3 x 12-bottle sample suites for TDMn analysis during "BRIDGET" tow-yos through the "RAINBOW" hydrothermal plume.
Other chemical oceanographic measurementsQuantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.
Data held at BODC 
Series/Profiles 
5  CTD/STD cast
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column

BODC idDate/TimeLocationDoc.
4746421994-09-18 12:20 36° 22' 18" N  29° 40' 23" W  View metadata report for BODC series reference number 474642
4746541994-09-20 09:02 36° 16' 0" N  33° 52' 48" W  View metadata report for BODC series reference number 474654
4746661994-09-20 13:53 36° 15' 29" N  33° 53' 35" W  View metadata report for BODC series reference number 474666
4746781994-09-22 16:48 36° 15' 29" N  33° 53' 24" W  View metadata report for BODC series reference number 474678
4746911994-09-22 18:48 36° 15' 54" N  33° 53' 12" W  View metadata report for BODC series reference number 474691