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Ultrasonic telemetry system was one of the most useful methods to observe the underwater target. But this system had disadvantage to need exclusive receiving device. We developed the sonar responding acoustic tag (called SRAT) to resolve the disadvantage. SRAT was acoustic tag that signals are appeared on the sonar display. The prototype of SRAT is responded the sonar signal between 20 kHz to 90 kHz...
We presents a new information management system to verify tuna fish chain-of-custody from fishing vessel to the market, which consists of a radio frequency identification (RFID) system, a personal computer (PC), and a low orbital communications satellite (ORBCOMM) system. An RFID tag implanted into tuna fish body records fishing condition data, i.e., fishing time and position (latitude & longitude),...
We tried to develop a new automatic fishery investigation system comprising an RFID system and DGPS. This new system will be able to obtain a detailed fishery operation data, such as the fishing gear positions and fish caught at each point. The greatest merit of the new system is that fishing operation data can be collected without disturbing the usual operation. The reason to develop this system...
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