If an aircraft is NORDO, where will it orbit and at what airspeed?

When an aircraft is NORDO (No Radio), it signifies that the aircraft is unable to communicate over the radio. In such scenarios, standard procedures are established to maintain safety and orderly traffic management.

Orbiting typically occurs at a specific radial and distance from a reference point, usually designated by a VOR (VHF Omnidirectional Range) station. In this context, the correct option mentions orbiting at the center radial/DME (Distance Measuring Equipment) at an airspeed of 180 KIAS (Knots Indicated Air Speed). This is important for maintaining a safe distance from other aircraft and ensuring proper separation within the airspace, especially in a busy terminal environment.

Choosing 180 KIAS is suitable because it aligns well with the standard operating procedures for NORDO aircraft. This speed allows for a reasonable rate of turn and managing the aircraft's performance effectively while conducting the orbit. The use of the center radial also helps in maintaining a stable position relative to known navigational aids, making it easier to visually acquire other traffic and adhere to established flight paths.