"Horizontal ichthyoplankton tow-net system - Nester (1987)"@en . . "SDN:L22::NETT0069" . "A 50 cm diameter circular net ring is mounted in a 53cm x 53 cm rectangular frame. The net is a cylinder-cone with 0.333 mm nylon mesh. The tow bridle is attached to a spreader bar to keep the net opening clear of the bridle and depressor attached to bottom of frame. It has two flowmeters: one inside the net and one outside. Usually towed at 3 knots. Mainly for catching larval fish. Similar to the Blackburn and Keith system. It has no opening/closing mechanism."@en . .