The Traffic Separation Scheme in the approaches to Los Angeles-Long Beach consists of three parts: a Precautionary Area, a Western Approach, and a Southern Approach. The specific areas in the approaches to Los Angeles-Long Beach are described in §§ 167.501 through 167.503. The geographic coordinates in §§ 167.501 through 167.503 are defined using North American Datum 1983 (NAD 83).