1. To further develop the versatility of the Marine Laboratory semi pelagic trawl PT148 by towing it on rough ground and in midwater with a variety of bottom and midwater doors whilst observing it with underwater tv.
2. To perfrom engineering and net design studies on two commercially used midwater trawls.
Jack H B Robertson (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Biology and fisheries
Description: Engineering and net design studies on a Jackson trawl and a Cosalt midwater trawl.
Description: Developing the Marine Laboratory semi pelagic trawl PT148.