Division (3) Shrimp Trawl – Codend Strengthening Bag, for vessels directing for shrimp in the NRAF1

A strengthening bag is defined as an outer covering of netting that can be used on a shrimp trawl to protect and provide strength to the codend of the shrimp trawl.

1. (a)

   Vessels shall not use a strengthening bag of which the mesh size is less than 130 millimetres.

2. (b)

   The strengthening bag shall not extend forward of the sorting grids or grates or obstruct the sorting grids or grates in any way.

3. (c)

   A strengthening bag shall not be attached in any way that restricts the authorized mesh or obstructs the mesh opening.

4. (d)

   Vessels shall not use a strengthening bag with any other top-side chafers simultaneously.

   

Shrimp Toggle Chains

Toggle chains are chains, ropes, or a combination of both, which attach the footrope to the fishing line or bolchline at varying intervals.

The terms ‘ fishing line ’ and ‘ bolchline ’ are interchangeable. Some vessels use one line only; others use both a fishing line and a bolchline as shown in the sketch.

The toggle chain length should be measured from the centre of the chain or wire running through the footrope (centre of footrope) to the underside of the fishing line.

The attached sketch shows how to measure the toggle and chain length.