RRS Frederick Russell FR7/83

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Frederick Russell (74GG)
Cruise identifierFR7/83
Cruise period1983-04-22 — 1983-05-13
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
Objectives1. To obtain observational data - colour video tapes, black and white and colour photographs - on the sediments and carbonate producing animals using the Mark III Television and Camera Sledge from locations of interest not investigated during the RRS Challenger Cruise 9/81.
2. To obtain further dredge samples from the edge of the continental shelf and upper continental slope to the west and north of Scotland from locations not previously sampled.
3. To investigate the feasibility of using the Mark III Television and Camera Sledge for investigations into the bioturbation of sediments in the eastern Irish Sea.
4. To recover the IOS Taunton current meter mooring situated west of the Scillies and to obtain CTD and XBT profiles from the vicinity of the mooring.
5. To investigate the occurrence of deep-water corals in the Inner Hebrides using side-scan sonar.
6. To undertake sea trials of the IOS side-scan sonar systems and to test the upwards looking mode at different speeds and directions.
7. To obtain further noise level measurements for the RRS Frederick Russell to compare with those obtained in December 1981.
8. To obtain additional side-scan sonar data from the areas of strong tidal currents in the central English Channel.
Chief scientistJohn B Wilson (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Frederick Russell FR7/83 cruise report frederick_russell_7_83.pdf (0.60 MB) 
Ocean/sea areas 
GeneralNorth Sea
Norwegian Sea
Inner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
Celtic Sea
North East Atlantic Ocean (limit 40W)
SpecificEnglish Channel/ Irish Sea/ N. & W. Scotland
Track chartsRRS Frederick Russell FR7/83 cruise track — trk2917a.html RRS Frederick Russell FR7/83 cruise track — trk2917c.html RRS Frederick Russell FR7/83 cruise track — trk2917e.html
Physical oceanography 
BathythermographQuantity: number of profiles = 2
Water bottle stationsQuantity: number of stations = 2
Description: surface only
Current metersQuantity: number of recoveries = 8
Description: No. of recovered;deployed "Challenger" Cr.4/83;56 days
Geology and geophysics 
DredgeQuantity: number of deployments = 19
GrabQuantity: number of deployments = 20
Bottom photographyQuantity: number of images = 3000
Description: also 5 video
Multi-beam echosoundingQuantity: track kilometres = 1350
Long/short range side scan sonarQuantity: track kilometres = 1350