Cruise inventory

RRS Challenger CH4A/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH4A/76
Cruise period1976-03-06 — 1976-03-16
StatusCompleted
Port of departureGreenock, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeResearch
ObjectivesThe objective of this cruise was to participate in the JONSDAP expedition by:
(1) Deployment of instruments to measure variations in tidal height at five stations and currents at two of these stations between NE Scotland and the Norwegian coast.
(2) Work an E-W CTD section along 59° 20 min N between the northern tip of the Orkneys and the Norwegian coast.
(3) Measure surface temperature salinity using a continuous sampling unit along the CTD section and during passage through the North Channel and the Pentland Firth.
All objectives were accomplished.
Chief scientistNorman S Heaps (Institute of Oceanographic Sciences Bidston Laboratory)
ProjectJONSDAP 76
Cruise reportRRS Challenger CH4A/76 cruise report ch4and6_76.pdf — access key 'C' (0.61 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificNorth Channel Pentland Firth Northern North Sea
Track chartsRRS Challenger CH4A/76 cruise track — trk1778a.html RRS Challenger CH4A/76 cruise track — trk1778b.html RRS Challenger CH4A/76 cruise track — trk1778c.html RRS Challenger CH4A/76 cruise track — trk1778d.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1685.32
Description: Continuously logged temperature and salinity
CTD stationsQuantity: number of profiles = 44
Moorings, landers, buoys 
Physical oceanography 
Current meters58° 57' 0" N  1° 15' 0" W — Station 54. IOS Mk II tide gauge and 3 current meters deployed.
Current meters58° 37' 0" N  2° 25' 0" W — Station 53. Three current meters and bottom-mounted current meter/tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)58° 57' 0" N  1° 15' 0" W — Station 54. IOS Mk II tide gauge and 3 current meters deployed.
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  0° 15' 0" E — Station 55. IOS Mk II tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  2° 45' 0" E — Station 56. IOS Mk II tide gauge deployed.
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.
Sea level (inc. bot. press., inverted echosounder)59° 19' 59" N  4° 30' 0" E — Station 57. IOS Mk I tide gauge deployed.