Subelement C: DSC & Alpha-Numeric ID Systems— Topic :
Question 14C5
Element 7R (GMDSS-RO)Which of the following MMSI numbers indicates a U.S. flag ship station?
Explanation
An MMSI (Maritime Mobile Service Identity) is a unique 9-digit number assigned to identify maritime stations. The first three digits of an MMSI are called the Maritime Identification Digits (MID), which specify the country of registration for the ship or station.
For U.S. flag ship stations, the MIDs assigned are 303, 338, 366, 367, 368, and 369.
* **C) 303236824:** This MMSI begins with **303**, which is one of the MIDs designated for the United States. Therefore, it indicates a U.S. flag ship station.
* **A) 430326890:** This MMSI begins with 430, which is the MID for Japan.
* **B) 033609991:** An MMSI for a ship station typically does not begin with 0. The first digit being 0 usually indicates a group call or a coast station, not a ship station.
* **D) 257326819:** This MMSI begins with 257, which is the MID for Portugal.
Related Questions
14C3 What does the MID (Maritime Identification Digits) signify?14C4 Which of the following numbers indicates a U.S. flag ship station?14C6 Which of the following numbers indicates a ship station MMSI?15C1 A DSC call is received from a station with a MMSI number of 003669991. What type of station made the call?15C2 A valid MMSI number for a DSC call to a specific group of vessels is: