Abstract :
The system has been specifically developed for the real-time measurement of the physical and geometric characteristics of full-scale fishing gears and consists of: (a) Instruments attached to various positions on the gear for the measurement of tensile loads, distances, vertical heights, speed and depth. (b) Encoding and telemetry equipment which interrogate the instruments in sequence and transmit data by acoustic link to the listening ship. (c) Shipboard signal receiving equipment which processes received data for display visually on line printer, or through a computer interface. Information is transmitted over the acoustic link in an unambiguous way as each digital data word contains a specific reference to the source instrument. A degree of accuracy within 0.5% overall is achieved.
