If the vessel you wish to call is not listed...

Question 1 / 27070ox32Cp8ZaXwbOLiea9KC

Question 1 of 27070ox32Cp8ZaXwbOLiea9KC

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

Question 1 of 27070

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

🔍 Key Concepts

• MMSI (Maritime Mobile Service Identity) and how it is normally obtained • Difference between using a directory/address book versus manual entry on a DSC-equipped VHF radio • What information is actually contained in a DSC Distress call data directory

💭 Think About

• For each option, ask yourself: does this describe a realistic, standard way you could practically get or use the other vessel’s MMSI to place a call? • Think about what the DSC Distress call data directory is designed for: is it a general phone book, or something more limited? • Consider which options are just different methods of entering/using a known MMSI, and which one assumes something about where MMSIs are stored that may not be correct.

✅ Before You Answer

• Verify what data is typically stored in a DSC Distress call data directory on a VHF radio. • Check which options involve obtaining a valid MMSI from an external reference (like ITU publications) versus relying on something inside your own radio. • Confirm which actions would definitely allow you to place a DSC call once you know the MMSI, and which action depends on information that likely is not available in that location.

Question 1 of 27070

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

Look in the DSC Distress call data directory for the MMSI number of the other vessel.

The vessel's MMSI number could be manually entered during the call setup.

The vessel's name and MMSI number may be entered in the address book for use.

Look the number up in the ITU books and manually call the vessel.

Question 1 / 27070ox32Cp8ZaXwbOLiea9KC

Question 1 of 27070ox32Cp8ZaXwbOLiea9KC

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

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Question 1 of 27070

If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?