A suprabenthic net with a mouth area of 0.6m2 and a mesh of 0.33mm can be mounted above the basic frame and opens and closes with the other nets. The parameters are acoustically monitored, controlled and displayed on board ship. Adjustable cutting bar varies the depth of sediment sampled. A weak link is incorporated in the towing bridles, in case of snapping on the sea-bed. A larger safety harness facilitates retrieval.
All nets feature coarse mesh chafers.