Oscar Mike to the glossary. Copy that.
Acknowledgment that a message was received and understood. 'Roger' is NATO phonetic for 'R' (received), not a name, though many assume otherwise.
The commanding officer or principal decision-maker, as opposed to subordinates. When you need an answer, you ask for 'Actual' rather than the NCO who's probably tired and making coffee.
A landing followed by immediate takeoff without stopping, used in training. Also metaphorically for any brief, intense encounter that doesn't linger.
Heat emissions from military equipment or personnel, detectable by infrared sensors. The military version of 'your heating bill says you're home.'
Forward-Looking Infrared—sensor technology that detects heat signatures ahead of aircraft or vehicles. The military's way of seeing through darkness and smoke.
Air-to-ground combat support against enemy forces near friendly troops. The reason ground soldiers love pilots who can actually hit what they're aiming at.
Intelligence or strategic capability that's unstable and subject to external forces; information that may dissipate without immediate action.