On a slope, where should an aircraft aim to land?

When landing on a slope, aiming for an upslope is the most advantageous choice for several reasons.

Landing on an upslope provides a natural braking effect for the aircraft. As the helicopter touches down and begins to slow, the inclined surface helps to stabilize the descent and reduce forward momentum, which can be especially crucial in a helicopter's approach where precise control is necessary. The added incline also enhances visibility for the pilot, as it allows for a clearer sightline of the landing area and potential obstacles.

Furthermore, landing upslope can be safer in terms of wind conditions. Often, the wind is more predictable and manageable when approaching from uphill, as it allows pilots to land into the wind, creating a more controlled environment during touchdown.

In contrast, landing downslope can create challenges, such as increased forward speed during landing, which can lead to complications in control during touchdown and rollout. Level ground does not offer the benefits of a controlled descent provided by an incline, whereas aiming at the base of the slope might present obstacles or increased hazard due to terrain changes. Thus, aiming upslope maximizes safety and control during the landing process.