If operating within Ocean Area A1, and outside of NAVTEX coverage, a GMDSS-equipped vessel must carry?

Correct Answer: Option D — Equipment capable of reception of Maritime Safety Information by the Inmarsat enhanced group call system, or HF NBDP.

When operating outside NAVTEX coverage, vessels must still receive Maritime Safety Information. GMDSS regulations require the use of Inmarsat EGC or HF NBDP to ensure that critical navigational and meteorological warnings are received, maintaining the vessel's safety status regardless of its proximity to terrestrial NAVTEX coast stations.