Answer :
Final answer:
Visual runways typically have no markings except for threshold markings, designators, and centerlines, and are used in good weather conditions where pilots navigate using visual flight rules. Hence, correct option is C.
Explanation:
The question pertains to the types of runways and their specific markings which are critical for the operation of airports and the safety of air travel. The type of runway usually having no markings except for threshold markings, designators, and centerlines is a Visual Runway. Visual runways are typically used in good weather conditions where pilots navigate using visual flight rules (VFR), and the basic markings provided are sufficient for safe operations. Unlike precision instrument runways and nonprecision instrument runways which are equipped with additional markings and navigation aids for use in varying visibility conditions, visual runways rely on the pilot's ability to see the runway's layout and its environment. Visual approach runways, a term not commonly used in official aviation documents, could cause confusion but generally would imply a type of visual runway. Thus, among the options provided, visual runways best fits the described characteristics.
