What is the OT factor for a target range of 3500 meters?

The OT factor, or offset time factor, is a critical element used in artillery fire calculation, particularly in relation to the distance of the target from the gun or launch point. For a target range of 3500 meters, the correct OT factor is 4. This calculation is essential for determining the delay needed for the projectile to reach the target effectively.

In the case of a range of 3500 meters, an OT factor of 4 indicates that the resulting calculations will account for various factors such as the projectile's speed and the time it will take to travel that distance. This ensures that the fire mission adjusts the timing of when the rounds are expected to impact, for coordination and accuracy in engaging targets.

The other options (2, 3, and 5) do not align with the practices and predetermined values typically used within artillery units for this specific range. Each OT factor is tied to established ranges and the nature of the artillery being utilized, whereby 4 is conventionally associated with 3500 meters. This standardized approach allows for consistent communication and execution in the field among artillery crews.