You estimate the Observer Target Distance to be 2600 meters. What is the OT factor?

You estimate the Observer Target Distance to be 2600 meters. What is the OT factor?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (B)

OT factor is the distance expressed in thousands of meters that the observer has to use for fire direction calculations. To find it, take the observer-target distance and convert it to thousands of meters. 2600 meters equals 2.6 thousand meters. Round to the nearest whole number, which gives 3. So the OT factor is 3. This matters because the plotting and firing data are often scaled by these thousand-meter units, and 2600 meters sits closest to 3,000 meters rather than 2,000, 4,000, or 5,000.

OT factor is the distance expressed in thousands of meters that the observer has to use for fire direction calculations. To find it, take the observer-target distance and convert it to thousands of meters. 2600 meters equals 2.6 thousand meters. Round to the nearest whole number, which gives 3. So the OT factor is 3. This matters because the plotting and firing data are often scaled by these thousand-meter units, and 2600 meters sits closest to 3,000 meters rather than 2,000, 4,000, or 5,000.