System for airborne observation of fish shoals at night

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Published under licence by IOP Publishing Ltd
, , Citation E M Thain et al 1978 J. Phys. E: Sci. Instrum. 11 468 DOI 10.1088/0022-3735/11/5/023

0022-3735/11/5/468

Abstract

A low-light-level television camera is installed in a pod mounted horizontally below an aircraft. This pod incorporates forward image motion compensation by means of a mirror, mounted at 45 degrees , which rocks +or-21/2 degrees at a rate which is set manually. The rocking mirror in combination with rotation of the pod, both under joystick control, can be used in a search mode. This system has successfully been used to search for fish shoals at night and to obtain image-motion-compensated video records for further processing in stock estimates.

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10.1088/0022-3735/11/5/023