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Figure F17. A. Results from plumbing leak test done prior to deployment of the Site U1364 ACORK instrument for lines leading from the umbilical line connections through the wellhead valves to the pressure sensors (see Fig. F16). Declines in pressure were the consequence of a slow (~0.1 µL/h) leak in the test supply system. Effects of ship's heave on the ship's water supply are seen prior to closing the supply valve. Response to the quasi-stepwise pressure change at the beginning and end of each test (sole transitional points shown in expanded view in B) demonstrates system frequency response to better than 1 Hz. B. Expanded view of A.

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