dk135

  by    0   0

The TRSP is used to protect bottom mounted equipment, primarily ADCP’s, from depradation by fishing trawls. They have been used extensively on the continental shelf of the North Atlantic, in the Gulf of Mexico and the Yellow Sea.

The TRSP has no actual working depth rating, as all modules are free-flooding. The range of the ADCP and the depth rating of the various electronic componets (Argos tramsmitters, strobes, RDF transmitters, etc.) can limit working depth.

All three modules of the TRSP are recoverable and reuseable. See Sketch of TRSP modules. The ADCP and an accoustic release are mounted in a positive buoyancy Instrument Housing, which is then placed in the Shield. The Deployment Mast is then mounted on top of the shield. Using a slack deployment line, the instrument is allowed to free-fall to the bottom. Once on the bottom, a seperate accoustic release on the Mast is triggered, and the positive buoyancy Mast floats back to the surface. The instrumentation in the Shield is left to record data.

Retrieval is accomplished by triggering the accoustic release in the Instrument Housing, which allows that module to float to the surface, trailing a negative buoyancy line which is attached to the Shield. The Instrument Housing is brought aboard the vessel, and the recovery line fed to a winch. The Shield is then winched aboard.


Related Posts

dk30

Specifically designed to protect the new generation of ADP’s and ADCP’s from fishing gear depredation, available in several models for any application. Model DK30-XxxxB Model shown is configured for a Sontek 250kHz ADP, with battery pack. Functions: The DK30 series is designed for use in the harshest environment. Other models are available for virtually any […]

READ MORE →

dk20

Trawl Resistant Shield – Model DK20 Specifically designed to protect the new generation of ADP’s and ADCP’s from fishing gear depredation, available in several models for any application. Functions: The DK20 series is designed for use in harbours, estuaries, and semi-protected waters. Other models are available for virtually any application. Deflects fishing gear up and […]

READ MORE →

Bionesstm Net Control System

A Control and Display System for all Zooplankton Net Systems Graph CTD Data in Real Time Drop Nets on Command True Real-Time Control Pre-program Autonomous Runs Generate Raw & Converted Data Files Retrofit Most Scientific Net Systems Plug & Play with Most CTD’s Stepper Motor Controller Built In Battery Packs Included Supplied Complete with Molded […]

READ MORE →

RMT

The designation “2+8” indicates effective net mouth sizes (at 45 deg angle) of: Top Net: 2 sq metres  Bottom Net: 8 sq metres An RMT 2+8 raised on a crane, with top net in the open position.

READ MORE →

tucker trawl

The Tucker Trawl is an opening and closing mid-water zooplankton trawl. It is typically equipped with a full suite of instruments, including inside and outside flow meters, CTD, pitch sensor and stepper motor. Open Seas supplies the Tucker Trawl with their Bioness data logger, which can open and close nets either in real time or […]

READ MORE →
Back to Top