RRS John Murray JM7/81
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM7/81 |
| Cruise period | 1981-06-13 — 1981-06-24 |
| Status | Completed |
| Port of departure | Immingham, United Kingdom |
| Port of return | Dundee, United Kingdom |
| Objectives | 1) To recover 24 moorings previously deployed during cruise 5/81.
2) To carry out a CTD and surface water sampling survey. 3) Redeploy one mooring adjacent to the Haisborough light vessel. 4) Evaluate the performance of a new surface marker buoy, a side scan sensor to aid rig recovery, and an overside sensor pack for surface water sampling. |
| Chief scientist | Alan J Harrison (Institute of Oceanographic Sciences Bidston Laboratory) |
| Cruise report |  (1.22 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | UK coastal waters |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 12 |
| CTD stations | Quantity: number of stations = 100 |
| Current meters | Description: 24 c.m.;12 days |
| Sea level (inc. bot. press., inverted echosounder) | Quantity: activity duration in days = 12 |
| Biology and fisheries | |
| Gear research | Description: acoustic trials, sidescan sonar tests, new overside sensor pack tested. |
