What is the primary channel used for bridge-to-bridge communication?

The primary channel used for bridge-to-bridge communication is the channel designated as 13, which operates at a frequency of 156.650 MHz. This channel is specifically allocated for vessel traffic services in U.S. waters, allowing vessels to communicate with each other regarding navigation and any potential hazards.

Channel 13 is also utilized for navigational safety communication in pilotage and is a critical tool for mariners to share information about their positions, intentions, and maneuvers. Its use helps ensure overall safety in crowded waterways and enhances the effectiveness of communication between vessels, particularly when navigating in congested areas.

In contrast, other channels listed, while they serve important functions, are designated for different purposes. For instance, channel 16 is primarily used for distress and calling, channel 22A is often used for coast guard and ship communications, and while channel 11 is used for ship-to-ship communications, it is not the primary choice for bridge-to-bridge communication, which emphasizes the clarity and safety of navigational exchange.