A ship operating in sea area A-1 must have the following provisions for maintenance:

Correct Answer: Option D — Any one of the above

Sea Area A1 is within the coverage of at least one VHF coast station providing continuous DSC alerting. Due to the proximity to shore-based support, SOLAS regulations permit vessels to satisfy maintenance requirements by selecting any one of the three options: duplication, at-sea maintenance, or a formal shore-based maintenance contract.