RRS Discovery D23
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D23 |
| Cruise period | 1968-07-31 — 1968-08-19 |
| Status | Completed |
| Port of departure | Plymouth, United Kingdom |
| Port of return | Plymouth, United Kingdom |
| Purpose | Trials |
| Objectives | The principal objective in this short cruise was the trial at sea and subsequent use of a new technique of seismic recording on the deep sea floor using pop-up methods. These experiments using surface explosive charges were combined with surface sonobuoy receivers using internal recorders and without radio links to the ship. The scientific aims of the seismic work were to detect reflections from the Moho using vertical and oblique incidence ray paths and to make a series of crustal structure refraction stations across the continental margin north of the Bay of Biscay. |
| Chief scientist | Anthony S Laughton (National Institute of Oceanography) |
| Project | Geophysics in and around the Bay of Biscay |
| Cruise report |  (5.19 MB) |
| Ocean/sea areas | |
| General | Bay of Biscay |
| Track charts | (0.41 MB) |
| Measurements | |
| Geology and geophysics | |
| Single channel seismic reflection | |
| Seismic refraction | Quantity: number of stations = 3 |
| Gravity measurements | Description: Gravimeter operated on all passage and survey lines. |
| Magnetic measurements | Quantity: track kilometres = 1481.6 Description: Magnetometer towed along all passage tracks as a matter of routine to fill gaps in existing data. |
