What code can be used to identify a Loss of Control (LOC) if it is not displayed on the Primary Flight Display (PFD)?

The correct code for identifying a Loss of Control (LOC) situation that may not be displayed on the Primary Flight Display (PFD) is indeed Morse code. Morse code can be transmitted using various means, including lights or sound, making it a practical option in aviation for signaling distress or operational issues. In scenarios where visual displays are not functioning or circumstances limit visibility, Morse code can effectively communicate critical information.

While other codes or indicators, such as Braille or binary code, may serve specialized purposes or be used in different contexts, they do not align with established aviation communication practices specifically for identifying emergency situations involving loss of control. Signal flags, while useful for visual communication, are not typically employed in situations where electronic systems fail. Thus, Morse code stands out as the conventional and effective choice for signaling such scenarios.