Boating Coach
Communication and distressQuestion 354 of 566

What does a Maritime Identity (MI) number identify?

  1. Your vessel
  2. Your trailer
  3. Your home port
  4. You, as an individual
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Correct answer: You, as an individual

An MI is a 9-digit number for a person. It goes in a personal portable radio.

Source: Safe Boating Guide (TP 511E, 2026), What is an MI?, page 49

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Questions last reviewed: 18 October 2026