What VHF channel is primarily used for initial distress calls?

VHF Channel 16 is designated as the international distress frequency for maritime communication. It serves as the primary channel for vessels to make distress calls and request assistance in emergency situations. This frequency is monitored constantly by search and rescue services, as well as by other ships, ensuring that any distress call made on this channel will receive immediate attention.

When a vessel is in distress or requires urgent help, using Channel 16 enables the transmission of a Mayday call, which alerts all nearby vessels and authorities to the emergency. This channel is universally recognized in the maritime community, making it the go-to frequency for distress communications.

The unique aspect of Channel 16 is its specific allocation for urgency and emergencies, contrasting with other channels that may be used for general communication or non-distress purposes. Channels like 70, while important for certain forms of communication (such as Digital Selective Calling), do not serve the primary role of initial distress alerts. Similarly, channels such as 06 and 12 have specific uses that do not include the urgency associated with distress calls, reinforcing the importance of Channel 16 in emergency situations.