- Low Visibility Operations/Surface Movement Guidance and Control Systems
- Date issued
- Office of Primary Responsibility
This AC provides guidance for airport operators when developing an LVO/SMGCS Plan. There may be valid safety and operational reasons for a specific LVO/SMGCS Plan to vary from the AC 120-57 (current edition) guidance due to unique local issues, environmental factors, or volume of traffic operations. This document contains specific examples some airports have used to meet its intent.
- AC 120-57C (PDF)
Cancels Number Title Date 120-57B Surface Movement Guidance and Control System
This Advisory Circular (AC) describes the standards and provides guidance in the development of a Surface Movement Guidance and Control System (SMGCS) plan for U.S. airports where scheduled Air Carriers are authorized to conduct operations when the visibility is less than 1,200 feet runway visual range (RVR). A SMGCS plan facilitates the safe movement of aircraft and vehicles on the airport by establishing more rigorous control procedures and requiring enhanced visual aids.