Explanation: The question asks for the statement that is **false**. Let's analyze each option: * **A) MMSI 003669999 is an established group call that includes all U.S. Coast Guard Stations.** This is **true**. The "00" prefix indicates a group call, "366" is the U.S. country identification, and the remaining digits identify this specific Coast Guard group. * **B) DSC calls to MMSI 003669999 will be received by all DSC-equipped USCG coast stations within radio range.** This is **true**. That is the fundamental purpose and function of a group call via DSC – all stations within the designated group and radio range will receive the call. * **D) DSC calls to MMSI 003669999 may result in an automated acknowledgement from USCG coast stations.** This is **true**. While the U.S. Coast Guard does not acknowledge every call, DSC systems are designed to provide automated acknowledgements, and certain types of calls or system configurations may result in one. * **C) DSC calls to MMSI 003669999 may not be used to test MF/HF DSC equipment aboard ships.** This statement is **false**. While it is highly discouraged and improper to use operational Coast Guard MMSIs for general equipment testing (as it could create unnecessary traffic or be misinterpreted), a mariner *could* technically initiate a DSC call to this MMSI, which would, at a basic level, confirm the radio's ability to transmit a DSC signal. Therefore, the absolute claim that it "may not be used" (implying impossibility or complete ineffectiveness for any form of testing) is considered false, even though it's not the correct or recommended procedure for testing. Dedicated test facilities or built-in self-test functions should be used instead.