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Subelement D
DSC & Alpha-Numeric ID:
Section 25
Inmarsat Mobile Numbers for "C" Terminals:
You receive a TELEX with the sender's I.D. of 433863491. What type of terminal sent this message to your vessel?
  • Correct Answer
    Inmarsat-C
  • Land TELEX terminal
  • Inmarsat-B
  • Inmarsat-M

You receive a TELEX with the sender's I.D. of 433863491. What type of terminal sent this message to your vessel?

(A). Inmarsat-C

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The vessel's location data uses code 43, as the first two digits of a 9-digit number.

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

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You receive a TELEX with the sender's I.D. of 436640927. What type of terminal sent this message to your vessel?
  • F77 Fleet
  • Correct Answer
    Inmarsat-C
  • Land TELEX terminal
  • Inmarsat-M

You receive a TELEX with the sender's I.D. of 436640927. What type of terminal sent this message to your vessel?

(B). Inmarsat-C

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The vessel's location data uses code 43, as the first two digits of a 9-digit number.

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

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Which of the following would indicate an Inmarsat-C terminal?
  • 003668202
  • 325468263
  • Correct Answer
    436682433
  • 1500270

Which of the following would indicate an Inmarsat-C terminal?

(C). 436682433

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The vessel's location data uses code 43, as the first two digits of a 9-digit number.

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

Tags: none

Which of the following would indicate an Inmarsat-C terminal?
  • 150036
  • 366294824
  • 1502690
  • Correct Answer
    430346275

Which of the following would indicate an Inmarsat-C terminal?

(D). 430346275

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The vessel's location data uses code 43, as the first two digits of a 9-digit number.

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

Tags: none

Which of the following would indicate an Inmarsat-C terminal?
  • Correct Answer
    436682011
  • 003662517
  • 325468325
  • 1500241

Which of the following would indicate an Inmarsat-C terminal?

(A). 436682011

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The vessel's location data uses code 43, as the first two digits of a 9-digit number.

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

Tags: none

Which of the following would indicate an Inmarsat-C terminal?
  • A 9 digit number beginning with the MID.
  • Correct Answer
    A 9 digit number always starting with 4.
  • A 7 digit number.
  • A 9 digit number always starting with 3.

Which of the following would indicate an Inmarsat-C terminal?

(B). A 9 digit number always starting with 4.

Inmarsat Numbers
2 Reserved for future use
3 Call in Inmarsat-B
4 Call in Inmarsat-C
5 Call in Inmarsat Aeronautical
6 Call in Inmarsat-M
76 Call in Inmarsat-mini-M
70-75 and 77-79 For future use
8 Fast special service terminations in Inmarsat-A
9 Future expansion

For additional info, please see ITU's List of Ship Stations and Maritime Mobile Service Identity Assignments - Description of fields

The Inmarsat satellite systems providing maritime services consist of 9-digit numbers, with the first 2-digit codes that categorize the communication.

Meteorological information starts with code 41, while navigational warnings and hazards use code 42. The vessel's location data uses code 43, as the first two digits of a 9-digit number.

For more information, please see SatellitePhoneStore.com site page on
Inmarsat C Service Plans

Last edited by markadlerdallas. Register to edit

Tags: none

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