______ is the communication between ship stations and shore-based stations which concern the management and operation of the ship, normally taken to mean public correspondence to the exclusion of safety, distress, and urgency messages. These communications may be conducted on the appropriate frequencies. | 英语资料题库

单选题 ______ is the communication between ship stations and shore-based stations which concern the management and operation of the ship, normally taken to mean public correspondence to the exclusion of safety, distress, and urgency messages. These communications may be conducted on the appropriate frequencies.

A、 Distress communication

B、 Urgent communication

C、 Safety communication

D、 General communication

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