RV Farnella 4/84
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Farnella (74AE) |
| Cruise identifier | 4/84 |
| Cruise period | 1984-07-11 — 1984-08-15 |
| Status | Completed |
| Port of departure | Coos Bay, United States |
| Port of return | San Diego, United States |
| Purpose | Research |
| Objectives | The primary objective of Leg 4 of programme EEZ-SCAN was to construct a sonograph mosaic of the entire seafloor in water depth greater than 500m within the US Exclusive Economic Zone off Oregon and Washington. The survey was extended westward beyond the 200-nm limit of the EEZ where necessary to include the Juan de Fuca Ridge. Also, coverage was planned to extend into Canadian territory, perhaps to 49N, to obtain a complete picture of certain geological features.
The primary surveying instrument used was GLORIA, a unique long-range sidescanning sonar system. Additional geophysical data were collected with airgun and transducer seismic-reflection profiling systems and with a magnetometer, in order to aid our interpretation of the sonograph data. |
| Cruise report |  (0.66 MB) |
| Ocean/sea areas | |
| General | North East Pacific Ocean (limit 180W) |
| Track charts | (0.10 MB) |
| Measurements | |
| Physical oceanography | |
| Subsurface temperature and salinity measurements | Quantity: number of surveys = 1 Description: Leg: 4 Area insonified: 90, 000nm² XBT drops made once a day. 3.5 and 10kHz bathymetric profiles made. Analogue magnetic field measurements taken. GLORIA used. |
| Geology and geophysics | |
| Long/short range side scan sonar | Quantity: number of surveys = 1 Description: Leg: 4 Area insonified: 90, 000nm² XBT drops made once a day. 3.5 and 10kHz bathymetric profiles made. Analogue magnetic field measurements taken. GLORIA used. |
| Magnetic measurements | Quantity: number of surveys = 1 Description: Leg: 4 Area insonified: 90, 000nm² XBT drops made once a day. 3.5 and 10kHz bathymetric profiles made. Analogue magnetic field measurements taken. GLORIA used. |
