【单选题】When operating in areas beyond Inmarsat coverage, a GMDSS-equipped vessel must
A.
carry equipment capable of selecting any of the distress and safety DSC frequencies in the band 1605 - 27500 MHz
B.
maintain simultaneous DSC watch on 2765.5kHz, 6414.5 kHz, and at least one addi- tional distress and safety DSC frequency inthe band 1605 - 27500 kHz
C.
maintain simultaneous DSC watch on 2187.5 kHz, 8414.5 kHz, and at Ieast one addi tional distress and safety DSC frequency inthe band 1605 -27500 kHz
D.
carry VHF/UHF equipment capable of transm/tting and receiving on all distress and safety frequencies in the band 1605 - 27500 kHz using DSC, telephony and NBDP