Which navigation equipment remains available during an electrical emergency?

The navigation equipment that remains available during an electrical emergency includes systems that are designed to operate with reduced electrical power or have backup systems in place. In the context of the Embraer Regional Jet (ERJ), typically, the primary navigation systems that remain operational during such emergencies are ones that are crucial for maintaining situational awareness and communication.

In this case, the selected answer highlights components that are functional under emergency conditions. The presence of NAV/COM1 and GPS 2 in this configuration indicates readiness for both navigation and communication, which are vital in an emergency scenario. GPS 2 specifically is a robust navigation system that provides essential positional data even when other systems might be compromised.

This configuration is tailored to ensure that the flight crew can continue to receive navigational information and maintain communication with air traffic control or other relevant entities, emphasizing the need for reliable equipment under critical circumstances.