Enroute - Area Charts

This section, applicable to Area Charts only, is in addition to the other Enroute chart legend sections. 
Many items in the other sections are also applicable to the Area Charts.

Departure route.

Arrival route.

Arrival & Departure on same route.

Speed Limit Point-Speed restriction on shaded side of symbol.

Man-made structure having a height of 1000 feet or more above ground level.  The elevation is 
above mean sea level.

Airport diagram showing runways of major airports only.

Other airports are shown by green symbols.

Filing Sequence Number. The first digit refers to the terminal chart index numbers for that airport 
(71-1, 71-2, etc).

Communications frequencies for the major airports shown on an area chart are given in a block as 
illustrated above.

GENERALIZED TERRAIN CONTOURS

Terrain information may be depicted on area charts when terrain within the area chart coverage rises 
more than 4000 feet above the main airport.

Generalized terrain contour lines and contour values are depicted.  Gradient tints indicate the 
elevation change between contour intervals.  Contour lines, values and tints are printed in brown.  
Within contour intervals some, but not all, terrain high points may be included along with their 
elevation above mean sea level for use as an additional reference.

THE TERRAIN CONTOUR INFORMATION DEPICTED DOES NOT ASSURE CLEARANCE ABOVE 
OR AROUND TERRAIN OR MAN-MADE STRUCTURES.  THERE MAY BE HIGHER UNCHARTED 
TERRAIN OR MAN-MADE STRUCTURES WITHIN THE SAME VICINITY.  TERRAIN CONTOUR 
INFORMATION IS USEFUL FOR ORIENTATION AND GENERAL VISUALIZATION OF TERRAIN.  
IT DOES NOT REPLACE THE MINIMUM ALTITUDES DICTATED BY THE AIRWAY AND AIR 
ROUTE STRUCTURE.  Furthermore, the absence of terrain contour information does not ensure the 
absence of terrain or structures.