Cruise inventory

RRS Charles Darwin CD91A

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD91A
Cruise period1995-03-02 — 1995-03-22
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnFairlie, United Kingdom
PurposeResearch
Objectives1. 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 scientistBrian S McCartney (Proudman Oceanographic Laboratory)
ProjectLOIS - SES
Coordinating bodyNERC (SES Chairman: J.H. Simpson, UCNW)
Cruise reportRRS Charles Darwin CD91A cruise report cd91.pdf — access key 'C' (2.21 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificRockall-Hebrides-Malin, Shelf edge to the west of Scotland
Track chartsRRS Charles Darwin CD91A cruise track — cd91track.pdf (00 MB) 
Measurements 
Physical oceanography 
BathythermographQuantity: number of profiles = 2
Description: XBT to 750m, T7 probes
Other physical oceanographic measurementsQuantity: number of profiles = 2
Description: sound velocity and temperature profile
Geology and geophysics 
Multi-beam echosoundingQuantity: track kilometres = 6852.4
Description: Simrad EM12 swath bathymetry
Long/short range side scan sonarQuantity: activity duration in hours = 83
Description: (at 2.8 knots) TOBI side scan sonar, to +/-3km from track
Single channel seismic reflectionQuantity: activity duration in hours = 83
Description: TOBI 6kHz profiler
Data held at BODC 
Series/Profiles 
1  Multi-beam echosounder
Bathymetry and Elevation
Horizontal spatial co-ordinates
Reference numbers
Bathymetry and Elevation
Horizontal spatial co-ordinates
Reference numbers

BODC idDate/TimeLocationDoc.
10302871995-03-12 00:00 55° 30' 0" N  12° 14' 51" W — 57° 15' 0" N  6° 22' 57" W  View metadata report for BODC series reference number 1030287
Discrete samples 
2  Expendable BathythermographTemperature of the water column
2  Sound Velocity ProbeSound velocity and travel time in the water column
Temperature of the water column