During an illumination mission, your round burns on the ground for 13 seconds. What is your HOB correction if the rate of descent is 5 meters per second?

To determine the Height of Burst (HOB) correction for an illumination mission based on the given parameters, it's important to first understand how to calculate the correction based on the time the round burns and its rate of descent.

In this scenario, the illumination round burns for 13 seconds, and the rate of descent is 5 meters per second. To calculate how far the round descends during the burn time, you multiply the burn time by the rate of descent:

Distance descended = Burn time x Rate of descent

= 13 seconds x 5 meters/second

= 65 meters.

Typically, in the context of artillery, the HOB correction is made by adjusting the height of the explosion to ensure optimal illumination. When a round has descended and exerts illumination below the intended height of burst, the correction needs to be made to effectively place the illumination at the desired level.

Refining the height of burst requires taking the distance descended (65 meters) and adjusting accordingly. In standard military practice, this distance is often simplified into 50-meter increments for correction purposes during operations. Therefore, since the nearest whole number to 65 is 1.3 increments of 50, the effective change is commonly rounded up to the nearest 50