"On-scene" communications would best be represented by?

Correct Answer: Option A — NBDP on 2174.5

2174.5 kHz is the international frequency designated for NBDP distress and safety traffic. In GMDSS, on-scene communications involve the exchange of information between vessels in distress and assisting units. Using established MF NBDP frequencies allows for reliable, text-based coordination when voice communications are insufficient or unavailable.