115 FAA Chart Users’ Guide - Terminal Procedures Publication (TPP) - Terms Runway Declared Distance Information Runway Lights Time/Distance Table Base Information (Copter Approaches Only) AIRPORT DIAGRAMS Runway declared distance information when available will be indicated by   and is shown to the right of the airport  elevation in the sketch box. Declared distances for a runway represent the maximum distances available and suitable for  meeting takeoff and landing distance performance requirements. Other approach lighting is shown on the airport sketch as a symbol on the side of the runway  where they are actually located. Symbols that are shown in negative indicate pilot-controlled  lighting. Notes regarding approach lighting systems are shown at the bottom of the sketch box. Run- way lights (HIRL) (MIRL) (LIRL) (TDZL)(TDZ/CL) shall be indicated by a note, e.g. HIRL Rwy  9-27. Runway centerline lights (CL) are installed on some precision approach runways to facilitate  landing under adverse visibility conditions. They are located along the runway centerline and  are spaced at 50 foot intervals. Runways with CL are shown in a negative dot pattern through  the middle of the solid runway as illustrated in the airport sketch to right. Runway centerline lights will be indicated by a note only when paired with TDZL, e.g., TDZ/CL  Rwys 6 and 24. When applicable, a Time/Distance Table is provided below the airport sketch. The table provides the distance and time  that is required from the final approach fix to the missed approach point for select groundspeeds. Base Information, as required and necessary to identify the MAP area and in the vicinity of the landing area shall be pro- vided. Information shall be limited to and depict significant visual landmark features at and surrounding the MAP area and  the heliport/pad of intended landing. Airport Diagrams are specifically designed to assist in the movement of ground traffic at locations with complex runway/ taxiway configurations. Airport Diagrams are not intended for use in approach and landing or departure operations. An  airport diagram assists pilots in identifying their location on the airport, thus reducing requests for “progressive taxi instruc- tions” from controllers.