Pick up the correct statement from the following: A. Runway edge from the landing side, is called threshold B. Localizer indicates to the pilot his position with respect to the proposed alignment C. The glide slope indicates the correct angle of descent D. All the above

The correct answer is D. All of the above.

• The runway edge from the landing side is called the threshold. It is the point at which the aircraft must touch down during landing.
• The localizer indicates to the pilot his position with respect to the proposed alignment. It is a radio signal that is transmitted from the airport and helps the pilot to stay on the correct path during landing.
• The glide slope indicates the correct angle of descent. It is a radio signal that is transmitted from the airport and helps the pilot to descend at the correct angle during landing.

Both the localizer and glide slope are part of the Instrument Landing System (ILS), which is a system that helps pilots to land their aircraft safely in low visibility conditions.