Login or Register for FREE!
Login or Register for FREE!
Subel. D
6 questions
Subelement D

DSC & Alpha-Numeric ID:

Section 23

MMSI; Group and Coast Station I.D. Numbers

A DSC call is received from a station with a MMSI number of 003669991. What type of station made the call?

  • A vessel operating in Sea Area A3.
  • A group ship station
  • Correct Answer
    A U.S. coast station
  • An Intercoastal vessel

A DSC call is received from a station with a MMSI number of 003669991. What type of station made the call?

(C). A U.S. coast station

From US Coast Guard article on MARITIME MOBILE SERVICE IDENTITY

Coast Radio Stations (Base Stations)

"All coast or base stations use the format 0102M3I4D5X6X7X8X9,where the digits 3, 4 and 5 represent the MID and X is any figure from 0 to 9. Groups of DSC coast radio stations use the same format.

The combination 0102M3I4D506070809 is used to address all 00MIDXXXX DSC stations within the administration.

The combination 010293949506070809 is used to address all VHF DSC 00MIDXXXX stations worldwide. These two special combinations are not used in the United States.

The U.S. Coast Guard DSC group coast station identity is 003669999."

For additional information, see BoatUs, service Maritime Mobile Service Identity

Last edited by markadlerdallas. Register to edit

Tags: none

A valid MMSI number for a DSC call to a specific group of vessels is:

  • 003664523
  • 338462941
  • 003036483
  • Correct Answer
    030327931

A valid MMSI number for a DSC call to a SPECIFIC GROUP of vessels is:

(D). 030327931

A call may involve a vessel, a group of vessels, or a coast station. The MMSI number that is valid for DSC calls to a specific group of vessels is 030327931.

See more details on Coast Station MMSI LIst This document is in unformatted text. Best to copy into a doc editor and use the find function.

Also, MMSI information is on US Coast Guard site MARITIME MOBILE SERVICE IDENTITY

Last edited by markadlerdallas. Register to edit

Tags: none

A MMSI 030346239 indicates what?

  • Correct Answer
    Group MMSI
  • Inmarsat-C I.D. number
  • Coast station
  • Ship station

A MMSI 030346239 indicates what?

(A). Group MMSI

A call may involve a vessel, a group of vessels, or a coast station. The MMSI number that is valid for DSC calls to a specific group of vessels is 030346239.

See more details on Coast Station MMSI LIst This document is in unformatted text. Best to copy into a doc editor and use the find function.

Also, MMSI information is on US Coast Guard site MARITIME MOBILE SERVICE IDENTITY

Last edited by markadlerdallas. Register to edit

Tags: none

Which of the following statements concerning MMSI is true?

  • Coast station MMSI numbers have 9 digits starting with 4.
  • Correct Answer
    All MMSI numbers are 9 digits and contain an MID.
  • Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal.
  • Group MMSI numbers must begin with 2 zeros.
This question does not yet have an explanation! Register to add one

Tags: none

Which of the following statements concerning MMSI is FALSE?

  • All Coast Station MMSI must begin with 2 zeros.
  • Correct Answer
    All Coast Station MMSI must begin with the MID then 2 zeros.
  • A group call must begin with a single zero followed by the MID.
  • The first 3 digits of a ship MMSI comprise the MID.

Which of the following statements concerning MMSI is false?

(B). All Coast Station MMSI must begin with the MID then 2 zeros.

The MMSI ID #, or Maritime Mobile Service Identity consists of nine (9) digit code for the DSC's AIS, or the automatic identification systems to identify a vessel's station or coast station. The ship's MMSI ID # is listed in the database of the US Coast Guard distress response system.

The first three digits are the MID. For example, USA is 338, while Mexico is 345. Also, USA has additional MID's assigned: 366, 367, 368, and 369.

See International Telecommunications Union's, ITU, listing of MID's for various countries on
Table of Maritime Identification Digits

From US Coast Guard article on MARITIME MOBILE SERVICE IDENTITY

Coast Radio Stations (Base Stations)

"All coast or base stations use the format 0102M3I4D5X6X7X8X9,where the digits 3, 4 and 5 represent the MID and X is any figure from 0 to 9. Groups of DSC coast radio stations use the same format.

The combination 0102M3I4D506070809 is used to address all 00MIDXXXX DSC stations within the administration.

The combination 010293949506070809 is used to address all VHF DSC 00MIDXXXX stations worldwide. These two special combinations are not used in the United States.

The U.S. Coast Guard DSC group coast station identity is 003669999."

Last edited by markadlerdallas. Register to edit

Tags: none

Which of the following statements concerning MMSI is true?

  • All ship station MMSI must begin with a single zero and include the MID.
  • All group station MMSI must begin with the MID.
  • Correct Answer
    None of these answers are correct.
  • All Coast Station MMSI must be 9 digits and begin with the MID and then two zeros.

Which of the following statements concerning MMSI is true?

(B). All MMSI numbers are 9 digits and contain an MID.

The MMSI ID #, or Maritime Mobile Service Identity consists of nine (9) digit code for the DSC's AIS, or the automatic identification systems to identify a vessel's station or coast station. The ship's MMSI ID # is listed in the database of the US Coast Guard distress response system.

The first three digits are the MID. For example, USA is 338, while Mexico is 345. Also, USA has additional MID's assigned: 366, 367, 368, and 369.

See International Telecommunications Union's, ITU, listing of MID's for various countries on
Table of Maritime Identification Digits

Last edited by markadlerdallas. Register to edit

Tags: none

Go to 22 Go to 24
HamStudy.org™ is copyright 2024 Signal Stuff™, All rights reserved.
View Privacy Policy    |    Get help with HamStudy.org™