| 摘要 |
The subject matter of this application relates to a system for controlling the buoyancy of an elongated expansible, flexible liquid filled, marine seismic detection streamer by providing a pressure sensing switch assembly within the submerged streamer which includes a pressure sensing element exposed to the water pressure at the streamer depth and electrical contacts for operating an inlet valve and an exhaust valve upon downward or upward deviation of the streamer depth from a predetermined depth to admit additional quantities of a buoyancy control liquid from a supply line to the streamer to increase buoyancy or for discharging the control liquid from the streamer for decreasing buoyancy.
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