Presentasjon av datasystemet på F/F "Johan Hjort"

Abstract

The computer system on «Johan Hjort» is designed by the institute of Marine Research, Bergen with technical assistance from SCASE, (Scandinavian Control and System Engineering A.S) Bergen. The system is realised as an attempt to solve some of the problems connected to the usual analog integrators and to make use of the experiences with the computer system on R. V. "G. O. Sars". The most important advantages obtained are: - Extended dynamic range - Elimination of offset problems - Possibility for a great number of channels - Continuously analyzing of fish echoes. The main component in the system is a Nord-1 computer. The computer has several tasks, but the main task is to integrate the signals from an echo sounder during echo surveys and to analyze echoes from single fishes. It is a very flexible system, and the mode of operation can easisily be changed. The interface system performs rapid connection of additional peripheral units.