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The aim of this cruise was to develop a better understanding of carbon cycling in the pelagic waters of the Porcupine Abyssal Plain (PAP). There were three objectives: 1) Turnaround moorings at the PAP Observatory; 2) Conduct a 1-D time series on the central station of a wide range of biogeochmical processes and to back this up with a mesoscale survey of key variables; 3) To trial the use of Autosub for mesoscale surveys in conjuction with the ship. All objectives were met, although the tops of the moorings were found to be missing probably due to fishing activity and the Autosub trials were incomplete due to vehicle failure. A full mesoscale survey was carried out using the ship and an eleven day time series at the central station was achieved. Friday 23 June [JD174] Scientific party met at 13:00 to agree work plans. The Master gave welcome & safety talk at 15:00. We sailed at 18:00 after a series of delays. The Chief Officer was discharged off sick and a replacement was travelling from Lincolnshire. On reaching Plymouth, the railway shut due to a suicide on the track. The replacement mate required taxi from Plymouth to Falmouth. One of the ship's cranes broken, compromising our ability to handling moorings. The ship's engineers worked flat out yesterday and today and managed to cannibalise parts from other cranes. On sailing we moved into the lee of Falmouth Bay to carry out ship's compass check and then deployed Autosub briefly to check its sensors were working. The sea-state was surprisingly benevolent considering how hard the wind had been blowing for previous 3 days. The skies were still very cloudy. Saturday 24 June [JD175] We made an easy passage with winds BF 3-4. The scientists were finding their sea-legs, with no major problems. An Emergency muster & life boat drill was run at 10:30. We had a discussion about Autosub mission and decide to work the central box at PAP for the first deployment.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.
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Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.