Cruise inventory

RRS Challenger CH6/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH6/76
Cruise period1976-04-14 — 1976-04-22
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeResearch
ObjectivesThe objective of this cruise was to participate in the JONSDAP expedition by:
(1) Recovery of instruments laid on cruise CH4A/76 to measure variations in tidal height at five stations and currents at two of these stations between NE Scotland and the Norwegian coast. One of the two current meter rigs was recovered, the other being lost following an encounter with a fishing vessel. All five tide gauges were successfully recovered.
(2) Work an E-W CTD section along 59° 20 min N between the northern tip of the Orkneys and the Norwegian coast. Accomplished.
(3) Measure surface temperature salinity using a continuous sampling unit along the CTD section. Accomplished.
Chief scientistAlan J Harrison (Institute of Oceanographic Sciences Bidston Laboratory)
ProjectJONSDAP 76
Cruise reportRRS Challenger CH6/76 cruise report ch4and6_76.pdf — access key 'C' (0.61 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorthern North Sea
Track chartsRRS Challenger CH6/76 cruise track — trk1778e.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1648.28
Description: Continuously logged temperature and salinity
CTD stationsQuantity: number of profiles = 45
Moorings, landers, buoys 
Physical oceanography 
Current meters58° 37' 0" N  2° 25' 0" W — Station 53. Three current meters and bottom-mounted current meter/tide gauge deployed on CH4A/76 recovered
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  4° 30' 0" E — Station 57. Bottom mounted Mk I IOS tide gauge deployed on CH4A/76 recovered.
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  0° 15' 0" E — Station 55. Bottom mounted Mk II IOS tide gauge deployed on CH4A/76 recovered.
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  2° 45' 0" E — Station 56. Bottom mounted Mk II IOS tide gauge deployed on CH4A/76 recovered.
Sea level (inc. bot. press., inverted echosounder)58° 37' 0" N  2° 25' 0" W — Station 53. Three current meters and bottom-mounted current meter/tide gauge deployed on CH4A/76 recovered
Sea level (inc. bot. press., inverted echosounder)58° 57' 0" N  1° 15' 0" W — Station 54. Bottom mounted Mk II IOS tide gauge deployed on CH4A/76 recovered. Co-located current meter mooring lost.