Cruise inventory

FRV Mara 8B/70

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier8B/70
Cruise period1970-10-02 — 1970-10-09
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
Objectives1) Comparison of surface spectral irradiance using the quantaspectrometer (DAFS) and the Gamma spectrophotometer (MAFF).
2) Determination of beam attenuation coefficient by the use of the meter and by taking black body readings.
3) Measurement of diffuse attenuation coefficient by the twin cell selenium-cell photometer and by vertical target settings.
4) Determination of underwater visibilities using standard techniques and photographs of targets, taken for densitometric analysis.
Chief scientistC C Hemmings (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 8B/70 cruise report mara8_70.pdf — access key 'C' (0.13 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificOff Buckie, mouth of Cromarty Firth
Physical oceanography 
Optics (eg underwater light levels)Quantity: activity duration in days = 7
Description: A photometry programme took place during the final week 5 miles off the coast of Buckie.
Biology and fisheries 
Gear researchQuantity: number of measurements = 1
Description: Sea trials of the 'Towed Underwater Vehicle' mock-up took place. No. of trials not specified.
Gear researchQuantity: activity duration in days = 7
Description: A seine net programme took place in cooperation with FRV Clupea