RRS Challenger CH8/82

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH8/82
Cruise period1982-05-21 — 1982-06-07
Port of departureFalmouth, United Kingdom
Port of returnBarry, United Kingdom
ObjectivesThe main purpose of the cruise was to test new or modified instruments and their associated hardware under realistic open ocean conditions. Between these tests opportunity would be taken to establish the operational boundaries of the two long baseline acoustic transponder sites in the Porcupine Seabight, and where possible, to use these transponders for fixing the position of the ship and moored equipment while carrying out these tests.
The principle instruments and hardware to be tested were: new Benthic Current and Temperature probe frame, Benthic Resistance Thermometer Array (BERTHA), Nautilus Float, near surface transponders, pitch-roll buoys, new pore water sampler, and reeler release. Plans had been made to test some other instruments but these were not available at the time of the cruise.
A calibration of the ship's EM log relative to one of the transponder baselines and a comparison of a TSD with IOS water bottles and a transponder were planned. It was also proposed to pay particular attention to the collection of the bathymetric data during the cruise, as this information was required for the production of a new chart for the Porcupine Seabight.
If enough time was available, a small detour would be made to recover and re-lay bathysnap.
Chief scientistM J Harris (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Challenger CH8/82 cruise report ch8_82.pdf (0.54 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificPorcupine Sea Bight
Track chartsRRS Challenger CH8/82 cruise track — ch8_82track.pdf (0.02 MB) 
Biology and fisheries 
Gear researchDescription: testing of new or modified equipment under realistic open ocean conditions.