Concept
Plummet net type II - Hovekamp (1989) and Daly [personal communication to Wiebe and Benfield]
| URI | http://vocab.nerc.ac.uk/collection/L22/current/NETT0144/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Hovekamp-Daly plummet net type II | ||
| Definition | A downward-fishing, vertical, closing plummet net with a 1-m2 rectangular mouth opening with a net that is attached to two bars that run along a pair of net bar glides along parallel sides. A double messenger system is used to opened the net as it falls to depth and to close it as it reaches the bottom of the haul. The net ~ 180 cm in length has been used with a variety of mesh sizes; 0.163 mm, 0.560 mm, and 1600 mm Nitex. According to Daly [personal communication], the first messenger releases a bridle attached to the opening net bar under tension from a shock cord. The second messenger releases two bridles, one attached to the back of the net frame and the other attached to the closing net bar. The net frame assumes a vertical position, allowing the second net bar to fall, closing the net, and retrieval is begun. | ||
| Date | 2011-10-21T14:18:49 | ||
| Identifier | SDN:L22::NETT0144 | ||
| Note | accepted | ||
| Is Version Of | NETT0144 | ||
| version | 1 | ||
| Broader | L05:22 |
plankton nets | |
L19:SDNKG17 |
sensor_model | ||
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