RRS Challenger CH9/79
Cruise summary report
|Ship name (ship code)||RRS Challenger (74CH)|
|Cruise period||1979-06-29 — 1979-07-11|
|Port of departure||Barry, United Kingdom|
|Port of return||Barry, United Kingdom|
|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)|
|General||North East Atlantic Ocean (limit 40W)|
|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