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Explains the function and description of each control on the radiotelephone unit.
Details how to select the channel or transmitting frequency for SSB.
Covers the procedure for transmitting signals, including automatic tuning.
Defines Digital Selective Calling (DSC) and its role in maritime communication.
Categorizes and describes different types of DSC messages.
Provides the procedure for transmitting a distress alert in a life-endangering situation.
Details the procedures for receiving and responding to distress alerts.
Explains how to cancel a distress call while it is being sent or awaiting acknowledgment.
Covers sending and receiving individual calls to specific stations.
Guides on entering ship's ID and answerback codes for NBDP operations.
Explains the simplest method for communicating with a telex subscriber.
Provides steps to check the radiotelephone for proper operation via self-check or daily test.
Offers solutions for common problems to restore normal operation.
Lists error messages, their meanings, and recommended remedies.