How many seconds before CAS TOT does an illumination on deck mark impact?

• A. 30 seconds
• B. 45 seconds
• C. 60 seconds
• D. 15 seconds

Answer: (B)

Coordinating illumination with the CAS time on target is about having the target area visibly lit when the strike occurs. Illumination rounds need time to travel, descend, and reach full brightness on the deck, so you schedule them to impact a short lead time before the weapons hit. Forty-five seconds before the CAS TOT gives enough margin for the illumination to be at peak brightness right as the target is being engaged, providing a clear reference for the pilots and ensuring the target is properly visible at impact. Too little lead time risks dim or missing illumination at the moment of impact, while too much lead time means the light could fade before the strike.