RRS Charles Darwin CD91A
Cruise summary report
| Cruise Info. | |||||||||
| Ship name (ship code) | RRS Charles Darwin (74AB) | ||||||||
| Cruise identifier | CD91A | ||||||||
| Cruise period | 1995-03-02 — 1995-03-22 | ||||||||
| Status | Completed | ||||||||
| Port of departure | Barry, United Kingdom | ||||||||
| Port of return | Fairlie, United Kingdom | ||||||||
| Purpose | Research | ||||||||
| Objectives | 1. To obtain a detailed high resolution bathymetric map, principally along the slope between 55 degrees north and 60 degrees north, for use in numerical models, and as a basic guide for all the other SES work.
2. To obtain high resolution seismic profiles of surface sedimentary layers, for interpretation for site stability and to compliment and extrapolate from cores. 3. To obtain a wide area view of the sea-bed surface roughness and bed features, as a guide to the placement of moorings and the choice of sites for cores and other sampling in later SES cruises, including Darwin CR91 Leg B following immediately. Evidence for sedimentary forms that can be interpreted as responses to hydrodynamic forcing will be sought. | ||||||||
| Chief scientist | Brian S McCartney (Proudman Oceanographic Laboratory) | ||||||||
| Project | LOIS - SES | ||||||||
| Coordinating body | NERC (SES Chairman: J.H. Simpson, UCNW) | ||||||||
| Cruise report |  (2.21 MB) | ||||||||
| Ocean/sea areas | |||||||||
| General | North East Atlantic Ocean (limit 40W) | ||||||||
| Specific | Rockall-Hebrides-Malin, Shelf edge to the west of Scotland | ||||||||
| Track charts | (0.32 MB) | ||||||||
| Measurements | |||||||||
| Physical oceanography | |||||||||
| Bathythermograph | Quantity: number of profiles = 2 Description: XBT to 750m, T7 probes | ||||||||
| Other physical oceanographic measurements | Quantity: number of profiles = 2 Description: sound velocity and temperature profile | ||||||||
| Geology and geophysics | |||||||||
| Multi-beam echosounding | Quantity: track kilometres = 6852.4 Description: Simrad EM12 swath bathymetry | ||||||||
| Long/short range side scan sonar | Quantity: activity duration in hours = 83 Description: (at 2.8 knots) TOBI side scan sonar, to +/-3km from track | ||||||||
| Single channel seismic reflection | Quantity: activity duration in hours = 83 Description: TOBI 6kHz profiler | ||||||||
| Data held at BODC | Get data | ||||||||
| Series/Profiles | |||||||||
| 1 Multi-beam echosounder | Reference numbers Horizontal spatial co-ordinates Bathymetry and Elevation
| ||||||||
| Discrete samples | |||||||||
| 2 Expendable Bathythermograph | Temperature of the water column | ||||||||
| 2 Side-scan Sonar System | |||||||||
| 2 Sound Velocity Probe | Sound velocity and travel time in the water column Temperature of the water column |
