What is the minimum altitude for night VFR obstacle clearance within 3 miles of the route to be flown?

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The correct answer of 1,000 feet refers to the minimum altitude required for night Visual Flight Rules (VFR) operations to ensure obstacle clearance when flying within 3 miles of the intended route. This altitude is established to provide a safety margin, allowing pilots to navigate without visual reference to the ground while still maintaining a safe distance from potential obstacles such as buildings and terrain.

In the context of night VFR, where visibility can be significantly reduced, it is particularly important for pilots to maintain this altitude to avoid collisions with obstacles that might not be visible in low light conditions. The 1,000-foot standard is in line with regulations that prioritize safety during night operations, as pilots are required to have a higher margin for error during those times. This standard helps ensure that regardless of the visibility conditions, pilots are operating at an altitude that provides sufficient clearance over structures and terrain.

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