Question 1 of 29218CnQ7zmLn9RADW3a0rCCA

Which of the following statements concerning MMSI is true?

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Question 1 of 29218
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Which of the following statements concerning MMSI is true?

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🔍 Key Concepts

• Maritime Mobile Service Identity (MMSI) structure and length • Difference between ship station, coast station, and group call MMSIs • Purpose of the Maritime Identification Digits (MID) and where they appear

💭 Think About

• For each option, ask yourself: does this correctly describe the length and starting pattern for that specific type of MMSI (ship, coast, or group)? • Consider which MMSI types always contain an MID and which may be structured differently. • Think about how group calls work in DSC (Digital Selective Calling): how does their MMSI need to differ from a normal ship MMSI so radios recognize them as a group call?

✅ Before You Answer

• Confirm that all standard MMSIs are 9 digits long and how that applies (or not) to each option. • Check which MMSI types must begin with specific leading digits or zeros and why. • Verify where the MID (Maritime Identification Digits) appears in a ship MMSI versus other MMSI formats.