Blar i Brage IMR på forfatter "MacLennan, David N."
Foote, Kenneth G.; MacLennan, David N. (Journal article; Peer reviewed, 1984)The properties of calibration spheres made from electrical-grade copper, denoted Cu, and tungsten carbide with 6% cobalt binder, denoted WC, are examined theoretically. Effects of variations in material, medium, and equipment ...
Svellingen, Ingvald; MacLennan, David N. (ICES CM Documents;1986/B:8, Working paper, 1986)
MacLennan, David N.; Svellingen, Ingvald (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1989)The split-beam echo-sounder is used to measure the target strength of fish. Calibration of this instrument requires sensitivity measurements to be made throughout the cross-section of the acoustic beam. It is necessary ...