Additional examples are adjusted to the entries in an automated way - we cannot guarantee that they are correct.
Maritime identification digits, a 3-digit code identifying the country of a ship/coastal station using communication equipment.
Maritime identification digits (MID)
A short post-transmission message is sent by the radio with the vessel identity and is in the form of an encoded call sign or Maritime Mobile Service Identity, starting with number '9' and the three country-specific maritime identification digits.