Selective Fishing, Discard Reduction and Fuel Conservation Video Series
Overview

 

 

Trawl Net Dynamics
In this video Harold Delouche of Memorial University (Newfoundland, Canada) discusses how trawl nets are affected by towing speed, door spread and rigging. Harold, and Tara Perry (Memorial University), provide compelling demostrations of these concepts using scale models in the flume tank. Seeing how dynamically trawl nets change shape based on these factors provides insight into what is happening to a trawl net on the seafloor during commercial operations.

 

 

Trawl Door Theory
What do I look for in a trawl door? In this video George Legge of Memorial University (Newfoundland, Canada) talks about how trawl doors operate and the theory behind them. He discusses how factors like towing speed and the angle of attack change the doors lift and drag characteristics. These concepts are reinforced through flume tank demonstrations. The video concludes with a discussion aboutreading manufacturers datasheets, how to read them, how to use this information to rig your doors and what to look for when purchasing new doors.

 

 

More videos are being uploaded every month. Check back soon!