Which of the following is NOT a limitation to Terrain Flight?

Mission planning is a crucial aspect of terrain flight operations, ensuring that crews understand the route, environmental factors, and any potential challenges. While insufficient mission planning time can pose challenges, it is not a direct operational limitation like the other factors listed.

Increased workloads refer to the heightened demands placed on pilots during terrain flight, requiring more attention to the environment, navigation, and flight adjustments. This can lead to cognitive overload, making it harder to manage the flight effectively.

Line-of-sight radio limitations can pose significant challenges for communication, especially in areas with varying terrain such as hills or mountains, which can obstruct radio signals. This impacts coordination and situational awareness, which are critical during terrain flight.

Increased stress factors arise from the demanding nature of terrain flight, where pilots must navigate obstacles and manage the aircraft in a potentially hostile environment, leading to elevated stress levels that can impact performance.

In contrast, while insufficient mission planning time is detrimental, it does not inherently restrict the execution of terrain flight operations in the same manner as the other limitations, making it the correct answer.