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Abstract

A display processing device capable of preventing generation of interference when performing voice wireless communications between a plurality of ships, or between a ship and a land station, and making normal voice wireless communications start smoothly, is provided. The display processing device includes a receiver and processing circuitry. The receiver receives a radio wave for voice. The processing circuitry performs a determination of a channel used for propagation of the radio wave for voice and a ship/land determination for determining whether an output source of the radio wave for voice is either one of a ship and a land station. The processing circuitry displays, on a screen indicative of a time-series change in the status of use for every channel that may be used, a result of the ship/land determination for the used channel.

First Claim