Cruise inventory

FRV Mara 11/68

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier11/68
Cruise period1968-11-18 — 1968-12-20
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
ObjectivesPart 1
1) To determine the effects of intense pulsed low frequencey sound and artificial light on fish
2) To carry out first sea trials of the sector scanning sonar system
3) To conduct pelagic trawling trials

Part 2
To carry out routine pollution surveys on Loch Eil

''Mara'' docked at Greenock on the 22/11/1968. During passage the compressed air sound source ('airgun') was tested and calibrated. New crew members embarked the ship on the 23/11/1968 and the sector scaning sonar was installed. Large numbers of saithe and some cod fished by hand lines, sprats, Euphausids, Meganyctiphanes norvegica and Pasiphaeasp. were also caught
Chief scientistColin J Chapman (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 11/68 cruise report mara11_68.pdf — access key 'C' (0.13 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
SpecificLoch Goil, Loch Linnhe, Loch Striven
Biology and fisheries 
Gear researchDescription: Gear trials took place throughout the cruise. The scanning sonar system, pelagic trawl, low frequency and artificial light gear were all tested. No. of trials not noted.