Final answer:
Emergency navigational assistance in aviation is the support provided to pilots facing emergencies like being lost, adverse weather, or equipment failure, typically using VDF equipment or ATC radar services.
Step-by-step explanation:
Emergency navigational assistance refers to the aid provided to pilots in various emergency or potential emergency situations. This can include scenarios where a pilot is lost, facing adverse weather conditions, or experiencing aircraft malfunctions or equipment failure. At certain locations, this assistance is given through the use of VDF (Very high frequency Direction Finding) equipment or by connecting the pilot with Air Traffic Control (ATC) for radar services. The objective of such support is to ensure the safety of the flight and those onboard by guiding the pilot to safely navigate out of the problematic situation.