Cruise inventory

FRV Clupea 1275C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier1275C
Cruise period1975-10-27 — 1975-11-21
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
Objectives1. To make hydrographic and plankton measurements in the Firth of Forth (27 - 31 October, 17 - 21 November) and in Sullom Voe and the JONSIS line (10 - 14 November).
2. To lay and recover 4 current meter moorings in the Firth of Forth.
3. To evaluate the Inter Ocean STD system.

A grid of stations were worked to collect samples for salinity, nutrient, and trace metal analysis, and for plankton analysis at the Firth of Forth. A section down the axis of the Voe was worked and an anchor station near the mouth of Orka Voe was worked using the N10 TS bridge and the direct reading current meter. Trials of the STD system were begun and were contiued in the southern Moray Firth. On reaching the Forth, calibration samples for heavy metal analysis were collected.
Chief scientistHarry D Dooley (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 1275C cruise report cl12_75.pdf — access key 'C' (0.11 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificFirth of Forth, Sullom Voe.
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of stations = 2
Description: TS measurements in Largo Bay
Subsurface temperature and salinity measurementsQuantity: number of stations = 6
Description: Stations worked using the Inter Ocean STD system
Current metersQuantity: number of deployments = 4
Description: Current meter moorings. 4 recoveries on the 20/11/1975 at the Firth of Forth
Current metersQuantity: number of stations = 2
Description: Current measurements in Largo Bay
Biology and fisheries 
SestonQuantity: number of stations = 2
Description: Plankton samples taken at the JONSIS line