Subelement G: VHF-DSC Equipment & Comms— Topic :
Question 48G1
Element 7R (GMDSS-RO)How are Routine calls usually formatted/initiated?
Explanation
Routine calls, when made via Digital Selective Calling (DSC), are initiated by interacting with the radio's interface. Modern marine VHF radios equipped with DSC are microprocessor-controlled and require users to navigate through menus and make specific selections to format a call. This includes choosing the type of call (e.g., routine), entering the recipient's Maritime Mobile Service Identity (MMSI), and sometimes specifying a working channel for follow-up voice communication.
Option A is incorrect because a "Distress Hot Key" is exclusively for initiating a Distress Alert, which is the highest priority call and distinct from a routine call. Option C is generally incorrect as there isn't a standard "Alarm" button for initiating routine DSC calls; routine calls are made through menu selections. Option D is incorrect because Channel 70 is the *dedicated* DSC channel used for initiating *all* types of DSC calls, including routine priority calls.
Related Questions
47G5 DSC Urgency priority calls may be sent using the “Distress Hot Key” under the following circumstances:47G6 A DSC Safety priority call might be used under the following circumstances:48G2 What would be the appropriate menu choice when calling another ship station?48G3 What would be the appropriate channel selection for follow-on voice communications for a Routine priority call to another vessel?48G4 If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?