When conducting an NDB approach with a published minimum descent altitude (MDA) of 500 feet AGL, what is the earliest point a pilot may descend below 500 feet AGL if visual reference is obtained?

Question: When conducting an NDB approach with a published minimum descent altitude (MDA) of 500 feet AGL, what is the earliest point a pilot may descend below 500 feet AGL if visual reference is obtained?

Answer options:

• Only after reaching the missed approach point (MAP) and having sufficient visual reference.
• As soon as the runway environment is in sight, regardless of aircraft position. ✅ When the aircraft is in a position from which a normal landing can be made to the intended runway, and visual reference is achieved.
• Once cleared to land by ATC.

Correct answer: When the aircraft is in a position from which a normal landing can be made to the intended runway, and visual reference is achieved.

Explanation: According to CAR 602.128, a pilot may descend below the MDA only when in a continuous position for a normal descent to the runway and the required visual reference is distinctly visible and identifiable.