What adjustment should be made for altitude when planning a jump?

The correct response highlights the procedure for adjusting the jump plan based on altitude changes. When planning a jump, it's essential to account for how altitude affects the drop zone, as higher altitudes can cause more significant variations in drift and descent rates due to differences in air density.

Adding 30 yards to both width and length for every full 100 feet above the planning altitude provides an appropriate compensation for these factors. This adjustment is crucial for ensuring that jumpers land in the desired area, as the additional distance accounts for the increased time in the air and potential drift caused by wind. This systematic approach allows jumpmasters to maintain control over the landing zone, improving safety and accuracy during jumps, especially at higher altitudes where adjustments become more critical.

Other options suggest incorrect values for the adjustments, either underestimating or overestimating the necessary changes based on altitude. Ensuring that the adjustment figure is accurate is vital for jump planning, so recognizing 30 yards as the standard compensation per 100 feet is essential knowledge for effective jumpmaster operations.