Explanation: GMDSS regulations require vessels to maintain their critical communication equipment in operational condition. Statement D is false because, regardless of whether shore-based maintenance is chosen, the maintenance services *must* be performed to ensure equipment functionality and compliance. The chosen maintenance option outlines *how* the service is provided, not whether it needs to be completed. A) Correct. For Sea Areas A1 and A2, vessels need to provide at least one of the three GMDSS maintenance options: duplication of equipment, shore-based maintenance, or on-board maintenance. B) Correct. For Sea Areas A3 and A4, due to their remote nature, two independent maintenance options are required to ensure greater reliability. C) Correct. Equipment warranties typically cover defects and are not a substitute for the comprehensive and ongoing maintenance regime required by GMDSS, which includes preventative checks, regular servicing, and guaranteed repair timelines.