What is the minimum flight planning altitude over snow-laden mountains in Canada during winter?

The correct choice highlights the importance of safety when flying over snow-covered mountainous terrain. During winter, snow can obscure the topographical features of the land, potentially complicating navigation and increasing the risk of controlled flight into terrain (CFIT) incidents. The regulations dictate that pilots must maintain a minimum altitude to ensure adequate clearance above any terrain that may not be visible due to snow cover.

By planning to fly at least 1000 feet above the published Minimum Enroute Altitude (MEA), pilots are essentially providing an additional safety buffer. This extra altitude helps accommodate variations in terrain elevation that may not be accurately represented on charts, especially in winter conditions when visibility may be reduced or misleading.

The MEA itself is established for obstacle clearance and signal reception, but flying an additional 1000 feet increases the margin for error and helps to ensure that pilots remain safely clear of any unforeseen obstructions that may arise. Thus, the choice reinforces the critical nature of altitude awareness and proactive safety measures in adverse weather conditions, particularly in challenging mountainous terrains.