Description and Test of a Fishing Trawl and Net Resistant Bottom Mounted Current Meter,with Diverless Surface Deployment and Recovery Capabilities.

摘要

The design of a unique bottom mounted current meter mounting frame was initiated. The device provides some protection from nets and/or cables trailing behind a surface vessel fishing or dragging in the area. On deployment, and before release, it has the capability of relaying its vertical orientation to the surface operator. Through the use of a line messenger, the assembly can be mechanically released from the deployment line. It does not require an electrical power or instrumentation lead to relay vertical positioning or to accuate the release mechanism. On acoustic recall from a surface vessel, the assembly releases a float and lift line, providing a means of recovering the current meter and the mounting frame.