Which channel is not part of the four main channels that need to be scanned?

The channel labeled as EMERGENCY is not considered one of the four main channels that responders typically scan during operations. The primary channels usually include AIRGUARD, CMD, and TAC channels, which are essential for coordinating firefighting efforts and ensuring that responders can communicate effectively in a variety of scenarios.

AIRGUARD is crucial for monitoring air operations and ensuring that aerial resources are safely integrated into firefighting tactics. The CMD channel is dedicated to command communication, facilitating coordination among different units and managing incident operations. TAC channels are utilized for tactical communication among various teams engaged in specific actions during an incident.

In contrast, the EMERGENCY channel, while important in certain life-threatening situations, is not regularly scanned during routine operations as it is reserved for urgent communications and emergencies that require immediate attention. Therefore, it is not counted among the main channels that are routinely monitored for situational awareness and operational command.