An instrument runway served by ILS and/or MLS to and along the surface of the runway and: A - intended for operations with a decision height lower than 30 m (100 ft), or no decision height and runway visual range not less than 200 m. B - intended for operations with a decision height lower than 15 m (50 ft), or no decision height and runway visual range less than 200 m but not less than 50 m. C - intended for operations with no decisions height and no runway visual range limitations.