Is a certified BRD required in a rigid-frame roller trawl ?
A6: A shrimp trawler may use and have onboard up to two rigid-frame roller trawls that are 16 feet or less in length without certified BRDs. A rigid-frame roller trawl has a mouth formed by a rigid frame and a grid of rigid vertical bars, and rollers on the lower horizontal part of the frame to allow the trawl to roll over the bottom while being towed. No doors, boards, or similar devices are attached to keep open the mouth of the trawl.