BODC PROJECT DOCUMENT NO. 28542 Applies to BODC Series Ref. Nos.: 34137, 34149, 34230, 34242, 34254, 34266 IOS Celtic Sea Experiment 1980 An experiment was conducted by I.O.S. Bidston in the Celtic Sea during the period August to October 1980, in order to study sea level, vertical current structure and circulation patterns under stratified conditions. The experiment complemented one in March to May 1978 which studied the Celtic Sea under homogeneous conditions. 19 rigs containing recording current meters, thermistor chains or pressure recorders were deployed for 50 days at 8 stations. The density field was measured during both the deployment and the recovery legs by continuous monitoring of sea surface temperature and conductivity and by recording CTD profiles.