RV Cirolana CIR7/83

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR7/83
Cruise period1983-06-29 — 1983-07-28
Port of departureGrimsby, United Kingdom
Port of returnGrimsby, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) To recover the Rockall Bank array of five current meter moorings plus a mooring between the tail of Rockall bank and the mid-Atlantic Ridge. Accomplished.
(2) To re-lay the NEADS 6 mooring and an E-W line of 9 moorings along approximately 43-45N between the Iberia and Porcupine Basins. NEADS 6 plus 8 moorings deployed.
(3) To deploy a short-term thermistor chain mooring at the slope erosion zone on Porcupine Bank. Accomplished
(4) To work three full-depth 14C, 226/228Ra stations with nutrients and CTD on the meridional radiochemistry section, including one in the Discovery Gap. Five stations on transect worked, but Discovery gap not reached due to La Coruna port call for winch repairs.
(5) To work up to six coring stations. Three good gravity cores obtained plus two partial Kaston cores.
(6) To listen for COB and IOS SOFAR floats. Accomplished.
(7) To work XBT sections in regions of interest, including the proposed MAFF SOFAR float launch site in the Iberian Abyssal Plain. XBTs deployed along passage sections, but Iberia Abyssal Plain survey not possible.
(8) To recover and re-lay the colonisation experiment at the NEA dumpsite. Accomplished, but previous deployment compromised as drum failed to reach the bottom.
(9) To deploy and recover fish traps. Four deployments returning one Coryphanoides, abundant large amphipods, a few deep euphausids, a small unidentified abyssal fish and apparent postlarva.
(10) To test satellite-linked search and rescue buoys. Started but abandoned when the beacon sustained damage.
Chief scientistRobert R Dickson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Cirolana CIR7/83 cruise report ci7_83.pdf (0.28 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificN.E. Atlantic, mid Atlantic Ridge, tail of Rockall Bank
Track chartsRV Cirolana CIR7/83 cruise track — trk2938.html
Physical oceanography 
BathythermographQuantity: number of profiles = 96
CTD stationsQuantity: number of profiles = 3
Description: on two full-depth stations
Current metersQuantity: number of recoveries = 15
Description: current meters recovered with 275 days of data recorded
Chemical oceanography 
RadioactivityQuantity: number of samples = 9
Description: Gerard barrel samples for 14C
RadioactivityQuantity: number of samples = 7
Description: Surface caesium 137 (Cs-137)
Biology and fisheries 
Other biological/fisheries measurementQuantity: number of deployments = 4
Description: deep sea fish traps
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 5
Description: 3 good gravity cores plus 2 partial Kaston cores
Data held at BODC 
3  CTD/STD cast
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column

BODC idDate/TimeLocationDoc.
583121983-07-08 09:52 51° 41' 17" N  18° 13' 30" W  View metadata report for BODC series reference number 58312
583241983-07-11 18:23 47° 43' 53" N  16° 49' 41" W  View metadata report for BODC series reference number 58324
583361983-07-23 21:21 47° 46' 12" N  16° 50' 17" W  View metadata report for BODC series reference number 58336