RRS Challenger CH9/79
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH9/79 |
| Cruise period | 1979-06-29 — 1979-07-11 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Trials |
| Objectives | 1. To test a new two-tier opening/closing epibenthic sledge.
2. To test the RMT 1+8 monitor and command systems at long slant ranges and particuarly at shallow angles. 3. To obtain benthic samples, with the semi-balloon otter trawl (OTSB) and epibenthic sledge (BN) at a variety of depths in the Porcupine Sea-Bight and particuarly at 2000 and 4000m for comparison with those taken at similar depths in April 1978 during Discovery Cruise 92. 4. To obtain near-bottom mid-water samples at a number of epibenthic sledge stations for evidence of concentration of mid-water organisms in this part of the water column. 5. To test a new acoustic "dolphin" and to examine the effects of changes in the orientation of the acoustic array in monitoring the towed gears and particuarly the RMT 1+8. |
| Chief scientist | Anthony L Rice (Institute of Oceanographic Sciences Wormley Laboratory) |
| Cruise report |  (0.77 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Measurements | |
| Biology and fisheries | |
| Zooplankton | Quantity: number of samples = 11 |
| Nekton | Quantity: number of samples = 22 |
| Zoobenthos | Quantity: number of hauls = 17 Description: survey:taxonomy,energy tranfers,distribution |
| Other biological/fisheries measurement | Quantity: number of image series = 11 Description: bottom photography |
