Subelement G: VHF-DSC Equipment & Comms— Topic :
Question 48G4
Element 7R (GMDSS-RO)If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?
Explanation
The DSC distress call data directory contains information from vessels that have sent a distress call *to your radio*. It is not a general database of all vessels or a lookup service for routine communication. Therefore, you would not find the MMSI of an arbitrary vessel you wish to call there, making this action ineffective for resolving the problem.
Options B, C, and D are all valid methods. Most DSC radios allow direct manual entry of an MMSI during call setup (B). If you obtain the MMSI, you can permanently add it to your radio's address book (C). Finally, the International Telecommunication Union (ITU) publishes maritime directories containing MMSI numbers for many vessels, which can be looked up and then used to initiate a DSC call (D).
Related Questions
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?48G5 What conditions must exist for a completely automatic DSC acknowledgement of a Routine call and change to suggested working channel?48G6 What actions will take place upon receipt of a Routine call from another vessel if both vessels are programmed for automatic response and the ECC is no good?49G1 The DSC received call directory usually sorts and stores incoming calls in what manner?