What is the name of the signal when a pilot is unable to see the IFLOLS?

The correct answer is "Clara," which is the signal used in aviation to indicate that a pilot is unable to see the Integrated Fresnel Lens Optical Landing System (IFLOLS). This situation typically arises when visibility is compromised due to factors such as poor weather conditions, darkness, or obstacles obstructing the pilot's view. When a pilot communicates this signal, it prompts flight control to either provide guidance for the landing under alternative visual references or to facilitate other landing support measures.

Understanding this signal is crucial for both pilots and air traffic controllers as it ensures safety during landing operations on naval vessels, where reliance on visual aids is essential. Proper recognition and response to this signal help maintain effective communication and operational safety in challenging conditions.