RRS Challenger

Cruise summary report

Cruise Info.
Ship name (ship code)	RRS Challenger (74CH)
Cruise period	1974-02-07 — 1974-03-23
Status	Completed
Objectives	(RRS John Murray was also used as a platform during this exercise)
Chief scientist	Norman S Heaps (Institute of Oceanographic Sciences Bidston Laboratory)
Ocean/sea areas
General	Irish Sea and St. George's Channel Bristol Channel
Measurements
Physical oceanography
Surface measurements underway (T,S)	Quantity: track kilometres = 2222
CTD stations	Quantity: number of stations = 14
Sea level (inc. bot. press., inverted echosounder)	Quantity: activity duration in days = 32
Other physical oceanographic measurements	Quantity: number of profiles = 14 Description: sound velocity stations
Other physical oceanographic measurements	Quantity: activity duration in days = 59 Description: cable measurements of total flow
Moorings, landers, buoys
Physical oceanography
Current meters	53° 0' 59" N 5° 12' 0" W — Position B
Current meters	52° 15' 59" N 5° 34' 59" W — Position D
Current meters	52° 8' 59" N 5° 10' 59" W — Position E
Current meters	53° 45' 59" N 3° 42' 59" W — Position A
Current meters	52° 23' 59" N 6° 0' 0" W — Position C
Current meters	52° 4' 59" N 5° 45' 59" W — Position J