Cruise inventory

FRV Mara 11B/78

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier11B/78
Cruise period1978-10-12 — 1978-10-31
Port of departureStornoway, United Kingdom
Port of returnMallaig, United Kingdom
ObjectivesTo examine the performance of a 100 hp semi-pelagic trawl with 2 sizes of belly panel and to determine its optimum rig to obtain firm ground contact along its length with a rope-rounded footrope

To observe fish reaction to the rising belly panels of different mesh sizes to the netting at the codend mouth

Bad weather hampered diving operations for most of the cruise in Broad Bay. A sick crew member had to be landed on the 13/10/1978. A cruise break took place from the 19/10/1978 until the 24/10/1978
Chief scientistJohn Main (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 11B/78 cruise report mara11_78part2.pdf — access key 'C' (0.09 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
SpecificBroad Bay
Biology and fisheries 
Gear researchQuantity: number of hauls = 1
Description: To observe fish reactions to rising belly panels of different mesh sizes. It was noted that many flat fish became trapped in the net due to the steep angle. No. of hauls not specified.
Gear researchQuantity: number of hauls = 1
Description: To test the 110hp semi-pelagic trawl with two sizes of belly panel. The net was seen to pass over boulders of 1 foot high without any damage at 32lbs. Yet with an adjustment of weight it was found to be hard to lif the net off the seabed. No of trials not specified.