What does OT Factor describe?

• A. Relation in distance between the observer and the target
• B. For observers use, but relation in distance between the observer and the target
• C. Time of flight
• D. Target location

Answer: (A)

OT Factor describes the relationship in distance between the observer and the target. This geometric relationship is important because how far you are from the target changes how the target appears in your sight picture, affects angular subtensions and any corrections you need to apply, and influences measurement accuracy. It is not about how long a projectile takes to reach the target (time of flight), nor about merely where the target is located in space, nor a vague usage note. Understanding that OT factor centers on the distance relationship between observer and target helps you account for perspective, parallax, and sighting corrections when estimating ranges and aligning optics.