TOGA will switch Nav sources back to which if not there already?

• A. FMS
• B. NAV
• C. GPS
• D. VOR

Answer: (A)

When you press TOGA, the system prioritizes following the flight plan managed by the flight management system so the aircraft can execute the intended missed approach or go-around path. The FMS is the central source that stores the route for both lateral and vertical guidance, so TOGA automatically reselects it if it isn’t already active. Other nav sources (NAV for VOR/LOC, GPS, VOR) provide navigation in different ways, but they don’t carry the full flight-plan guidance the FMS offers, which is essential during a go-around. So TOGA returns navigation control to the FMS to ensure you fly the programmed path.