RRS Challenger CH4/83
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH4/83 |
| Cruise period | 1983-02-25 — 1983-03-08 |
| Status | Completed |
| Port of departure | Falmouth, United Kingdom |
| Port of return | Falmouth, United Kingdom |
| Purpose | Research |
| Objectives | The general aim is to relate sediment distribution and the nature of bedforms to hydraulic parameters meaasured in the benthic boundary layer.
During this cruise, 6 current meter moorings were laid to record boundary layer currents, 73 sediment samples recovered, miles of side scan sonar survey, with 17 successful photographic (mono, stereo and cine) and TV stations. |
| Chief scientist | Douglas Hamilton (University of Bristol Geology Department) |
| Cruise report |  (0.03 MB) |
| Ocean/sea areas | |
| General | Irish Sea and St. George's Channel North East Atlantic Ocean (limit 40W) |
| Specific | Celtic Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Bathythermograph | Quantity: number of profiles = 5 |
| Current meters | Quantity: number of deployments = 14 Description: 187 hours;part by vertical gradient unit |
| Geology and geophysics | |
| Grab | Quantity: number of samples = 73 Description: physical analysis of sediments |
| Bottom photography | Quantity: number of deployments = 12 Description: time lapse cine camera,mono camera,stereo camera,video camera |
| Single-beam echosounding | Quantity: track kilometres = 500 |
| Long/short range side scan sonar | Quantity: track kilometres = 926 Description: ms47ap.;also 270nm using dual scan |
| Single channel seismic reflection | Quantity: track kilometres = 105 |
| Other geological/geophysical measurements | Quantity: number of deployments = 5 Description: motion picture of sea floor |
