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

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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

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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

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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

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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."

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Which of the following statements concerning MMSI is TRUE?

(C). None of these answers are correct.

(A). All ship station MMSI must begin with a single zero and include the MID. FALSE
MID codes do not start with zero.

(B). All group station MMSI must begin with the MID. FALSE
Group codes do not start with MID.

(C). All Coast Station MMSI must be 9 digits and begin with the MID and then two zeros. FALSE
Do not start with MID and do not have then two zeros.

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

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