During IFR flight, if navigation or communication is lost, what is the standard procedure?

• A. Immediately cancel IFR and fly VFR to the nearest airport.
• B. Squawk and maintain last assigned route/altitude, then proceed by expected or filed route and reestablish contact with ATC as soon as possible.
• C. Squawk 7600 and continue on your current heading until ATC contacts you.
• D. Maintain the last assigned altitude but ignore the route and continue on the current heading.

Answer: (B)