Abstract

We have been focusing on wireless LAN for radiocommunication between ships for exchanging safety and efficiency navigational information each other. In the preceding trial, we used directional antennas and measured RSSI (Received Signal Strength Indication) and throughput between ships. However, the trial was held with one ship moored at the pier and just head-on situation. In this time, we carried out on-sea trial by sailing two ships keeping enough distance. By this trial, we confirm the characteristics of the directional antennas especially half-power angle which affected the radiocommunication performance. As a result, we achieved over 1 Mbps throughput between ships which was our target.

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