RRS Challenger CH82A
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH82A |
| Cruise period | 1991-07-12 — 1991-07-17 |
| Status | Completed |
| Port of departure | Troon, United Kingdom |
| Port of return | Hirtshals Havn, Denmark |
| Purpose | Research |
| Objectives | Study of sulphide- and methane-based ecosystems. First part of two leg cruise |
| Chief scientist | Paul Dando (Marine Biological Association of the UK) |
| Project | MAST 0044 Sulphide and methane based ecosystems |
| Coordinating body | MBA, Plymouth |
| Ocean/sea areas | |
| General | North Sea |
| Specific | North Sea (UK Block 15/25, pockmarks in the Witch Ground Basin) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| CTD stations | Quantity: number of stations = 17 |
| Current profiler (eg ADCP) | Quantity: number of stations = 13 Description: ADCP measurements associated with dissolved hydrogen and CH4 stations |
| Chemical oceanography | |
| Other dissolved gases | Quantity: number of stations = 13 Description: dissolved hydrogen and CH4 |
| Biology and fisheries | |
| Zoobenthos | Quantity: number of samples = 30 Description: box core samples for species composition and biomass of macro- & meiofauna |
| Geology and geophysics | |
| Single-beam echosounding | Quantity: number of track lines = 27 Description: lines - Simrad EA500 10kHz echosounding |
| Long/short range side scan sonar | Quantity: number of track lines = 25 Description: lines - Waverley side scan survey for shallow gas and seeps |
| Single channel seismic reflection | Quantity: number of track lines = 25 Description: lines - BGS deep tow boomer survey for shallow gas and seeps |
