RRS Challenger CH4A/76
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH4A/76 |
| Cruise period | 1976-03-06 — 1976-03-16 |
| Status | Completed |
| Port of departure | Greenock, United Kingdom |
| Port of return | Aberdeen, United Kingdom |
| Purpose | Research |
| Objectives | The 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 scientist | Norman S Heaps (Institute of Oceanographic Sciences Bidston Laboratory) |
| Project | JONSDAP 76 |
| Cruise report |  (0.61 MB) |
| Ocean/sea areas | |
| General | North Sea North East Atlantic Ocean (limit 40W) |
| Specific | North Channel Pentland Firth Northern North Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 1685.32 Description: Continuously logged temperature and salinity |
| CTD stations | Quantity: number of profiles = 44 |
| Moorings, landers, buoys | |
| Physical oceanography | |
| Current meters | 58° 37' 0" N 2° 25' 0" W — Station 53. Three current meters and bottom-mounted current meter/tide gauge deployed. |
| Current meters | 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) | 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 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° 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 4° 30' 0" E — Station 57. IOS Mk I tide gauge deployed. |
