Accessory EquipmentWhile fishing for flatfish the beam trawl is often equipped with tickler chains to disturb the fish from the seabed. For operations on very rough fishing grounds they can be equipped with chain matrices. Chain matrices are rigged between the beam and the groundrope and prevent boulders/stones from being caught by the trawl. Shrimp beam trawls are not so heavy and have smaller mesh sizes. A bobbin of groundrope with rubber bobbins keeps the shrimp beam trawl in contact with the bottom and gives flatfish the opportunity to escape.Handling EquipmentBeam trawl is normally towed on outriggers, one trawl on each side.Vessel Overview Beam trawlers are in most cases specialized medium size vessels, equipped with powerful engines arranged with large outriggers tow two parallel beam trawls.Fish OperationClose bottom contact is necessary for successful operation.