. . "SDN:L22::NETT0044" . . "Heron free-fall plankton net" . "Heron free-fall plankton net"@en . "Free-fall plankton net - Heron (1982)"@en . "accepted"@en . "A modified WP2 cylinder-cone closing net (mesh not specified) which is allowed to free-fall and then is strangled shut and retrieved. [Wiebe and Benfield 2003 Plate 10C]"@en . . . . . .