RRS John Murray JM16/75 (B/11/75)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM16/75 (B/11/75) |
| Cruise period | 1975-11-13 — 1975-11-16 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | Bristol Channel survey |
| Chief scientist | Eric I Hamilton (Institute of Marine Environmental Research, Plymouth) |
| Ocean/sea areas | |
| General | Bristol Channel |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: number of measurements = 17 |
| Water bottle stations | Quantity: number of stations = 9 Description: S surface only |
| Transparency (eg transmissometer) | Quantity: number of samples = 16 |
| Current meters | Description: 1 hour |
| Currents measured from ship drift | Quantity: activity duration in days = 3 |
| Sea level (inc. bot. press., inverted echosounder) | Quantity: activity duration in hours = 40 |
| Chemical oceanography | |
| Trace elements | Quantity: number of samples = 17 |
| Contamination | |
| Suspended matter | Quantity: number of samples = 17 |
| Trace metals | Quantity: number of samples = 17 |
| Biology and fisheries | |
| Phytoplankton | Quantity: number of samples = 2 |
| Zooplankton | Quantity: number of samples = 2 Description: identification,distribution,description |
| Benthic bacteria/micro-organisms | Quantity: number of samples = 14 |
| Meteorology | |
| Occasional standard measurements | Quantity: number of measurements = 4 |
| Atmospheric chemistry | Quantity: number of samples = 4 Description: Air particulates |
| Other meteorological measurements | Quantity: number of observations = 17 Description: sea and swell |
| Other meteorological measurements | Description: air sea inteface studies |
| Geology and geophysics | |
| Grab | Quantity: number of samples = 2 Description: physical/chemical analysis of sediments |
| Core - soft bottom | Quantity: number of cores = 16 Description: physical/chemical analysis of sediments |
| In-situ seafloor measurement/sampling | Quantity: number of measurements = 18 Description: radioactivity msmnts. |
