Which channel is primarily monitored for distress calls?

Channel 16 is recognized as the international distress frequency for maritime communication. It is primarily used for emergency calls and is monitored by the Coast Guard and other emergency responders. This channel plays a crucial role in ensuring that vessels in distress can communicate their situation to nearby ships and receive help quickly.

The significance of Channel 16 extends beyond just distress calls; it is also used for hailing other ships and initiating communications before switching to a working channel. This importance is emphasized by the fact that all vessels are required to monitor this channel while on the water, making it the primary focus for safety and rescue operations.

In contrast, the other channels mentioned, while they may have specific uses for communication, do not hold the same level of priority for distress calls. Thus, Channel 16’s unique status as the designated emergency frequency is why it is the correct answer in this context.