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The Ifremer-developed piezometer was lowered down 2560 m using the ship's cable rolled out on the A-Frame on the R/V Thompson. It was dropped at a rate of one metre per second for the final one hundred metres, where the momentum of its 999 kg "piezo“piezo-head" head” pressed the piezometer probe four meters into the sediments. It was a delicate operation performed from deck, involving both NEPTUNE Canada staff and ship crew.