FFS Walther Herwig III 415
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FFS Walther Herwig III (06NI) |
| Cruise identifier | 415 |
| Cruise period | 2018-03-27 — 2018-04-08 |
| Status | Completed |
| Port of departure | Bremerhaven, Germany |
| Port of return | Bremerhaven, Germany |
| Purpose | Research |
| Objectives | Objective
Test the performance of several nets (fish and plankton), test new and modified technical equipment and provide training on underwater vehicles. During the cruise, several gears were deployed and observed using a remotely operated towed vehicle (ROTV) - IMR-multisampler attached to a pelagic trawl (PSN205; with three codends) - IMR-multisampler attached to a pelagic trawl (PSN205; with five codends) - IMR-multisampler with preprogrammed time controlled releaser and remotely controlled releaser via hydroacoustic modem, tested up to 1500m distance and 650m depths - Isaacs-Kidd-Midwater Trawl (IKMT, Plankton Trawl) - IKMT with multisampler midi (Plankton multisampler) - Calcofi (Plankton trawl) with different setups - Bongo (Plankton trawl) - PSN205 (pelagic trawl): Measurement of net dimensions, mesh sizes, mesh angels and trawl forces to be used to validate net simulations These tests were conducted in the region close to and inside Søgnefjord (Norway). Additionally, some training with different technical setups for the ROV and the ROTV were performed and a link of the USBL-system to the ships navigation system was established and tested. |
| Chief scientist | Andreas Hermann (Thünen Institute of Baltic Sea Fisheries) |
| Cruise report |  (2.14 MB) |
| NPRC | (0.57 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Søgnefjord (Norway) |
