What four methods are used to deconflict aircraft from IDF?

• A. Lateral, Altitude, Time, Combination (lateral and altitude)
• B. Lateral, Altitude, Time, Speed
• C. Lateral, Distance, Time, Chord
• D. Time, Altitude, Frequency, Position

Answer: (A)

The main idea is that you deconflict from indirect fire by separating in space and time. Indirect-fire threats occupy a vertical and horizontal footprint, so aircrews use four methods to stay out of harm’s way: move laterally so you’re outside the artillery’s probable impact corridor; change altitude to be above or below the firing envelope; adjust timing so you’re not in the area during rounds’ flight; and use a combination of lateral and altitude separation when a single method isn’t enough.

Lateral separation keeps the aircraft off to the side of where the indirect fire is aimed, reducing the chance of crossing a burst path. Altitude separation shifts the aircraft up or down to clear the vertical reach of the rounds and the affected airspace. Time separation involves coordinating to avoid entering the area during the fire window, effectively letting the fire pass before you proceed. The combination option simply uses both horizontal and vertical separation together to gain additional clearance when needed.

Why the other possibilities aren’t used the same way: speed alone doesn’t redefine the protected airspace against indirect-fire bursts, and terms like distance, chord, or frequency aren’t standard deconfliction dimensions for IDF missions. Position or distance might describe where you are, but they aren’t the defined deconfliction methods in this context.