RRS Challenger CH30

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH30
Cruise period1988-06-06 — 1988-06-23
Port of departureTroon, United Kingdom
Port of returnBarry, United Kingdom
Objectives1. To make CTD transects across the Scottish continental shelf between the Mull of Galloway and the Butt of Lewis, and to collect radiocaesium samples upon selected transects.
2. To service SMBA current meter moorings N2 and N3 near the Wyville-Thomson Ridge and mooring Y in the Tiree Passage, and to retrieve five Bidston current meter moorings and two bottom pressure recorders from the St. Kilda shelf and slope.
3. To work CTD sections in the vicinity of the Wyville-Thomson Ridge and across Faroe Bank.
4. To make observations of the distribution of seabirds, especially in relation to feeding flocks and hydrographic structure, and to collect specimens in the North Channel and an offshore area.
5. To work CTD sections on the outer St. Kilda shelf in the vicinity of the Bidston moorings.
6. To work the Ellett Line section between Mull and the Anton Dohrn Seamount.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Coordinating bodyICES
Cruise reportRRS Challenger CH30 cruise report ch30_88.pdf (0.32 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificN Atlantic (West of Scotland)
Track chartsRRS Challenger CH30 cruise track — ch30_88track.pdf (0.05 MB) 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 142
Description: 106 S surface 140 S bottom
CTD stationsQuantity: number of stations = 147
Description: 68 in NANSEN data set
Current metersQuantity: number of stations = 7
Description: 8 deployed;4 months
Chemical oceanography 
RadioactivityQuantity: number of samples = 53
Description: water samples for radio-caesium analysis.
Biology and fisheries 
BirdsDescription: continuous throughout the cruise.
Mammals and reptilesDescription: continuous throught the cruise.