When the Captain's NORM/EMER switch on the ACP is set to EMER, what happens?

• A. The FO’s headset is connected to VHF COM 1 and VHF NAV 1
• B. The Captain’s headset is connected to VHF COM 1 and VHF NAV 1
• C. The PA system automatically announces the emergency to the cabin
• D. The autopilot automatically engages a failsafe mode

Answer: (B)

When the EMER position is set, the system gives the Captain priority for communications by connecting the Captain’s headset directly to the primary VHF radios—COM 1 and NAV 1. This ensures the Captain can transmit to ATC on COM 1 and monitor navigation audio on NAV 1 without others’ interference, which is crucial during an emergency. The PA system won’t automatically announce the emergency, and the autopilot isn’t affected by this switch.