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Celestial Navigation
(Southeast Asian Fisheries Development Center, 1989-05)
To carry out any activities at sea one needs to know how to fix positions, set a course and measure the distance. In the area of fisheries, navigational knowledge is obviously essential. For instance, when a fishing boat ...
An Introduction to Hydro Acoustic Echo Traces
(Training Department, Southeast Asian Fisheries Development Center, 1989-06)
This textbook, "An Introduction to Hydroacoustic Echo Traces", explains hydroacoustic information on the recording charts in the form of echo traces, digits and lines. Interpretation of echo traces is one of the most ...