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

To determine the height of burst (HOB) correction needed during an illumination mission, you first need to calculate the total descent distance of the round while it burns on the ground. Given that the round burns for 13 seconds at a descent rate of 5 meters per second, you can find the distance by multiplying the burn time by the descent rate.

Calculating this, you get:

13 seconds × 5 meters/second = 65 meters.

In an illumination mission, the objective is to have the illumination round explode at a height that maximizes its effectiveness. If the round burns for 13 seconds and descends 65 meters, you will need to adjust the height of burst (HOB) accordingly.

The typical adjustment for HOB in this context is often expressed in meters. Since the round has descended 65 meters, the correction to achieve the desired burning altitude is typically made by aiming higher (up). The calculation of the right amount, in this case, leads to a correction of 50 meters upward.

Therefore, the HOB correction needed is to go "up 50," making this choice correct. This ensures that the illumination round will detonate at the appropriate height to provide the necessary illumination for the intended area.