AIM 

6/17/21 

6.  Helicopter Route Charts. 

A three

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color 

chart series which shows current aeronautical 
information useful to helicopter pilots navigating in 
areas with high concentrations of helicopter activity. 
Information depicted includes helicopter routes, four 
classes of heliports with associated frequency and 
lighting capabilities, NAVAIDs, and obstructions. In 
addition, pictorial symbols, roads, and easily 

identified geographical features are portrayed. 
Helicopter charts have a longer life span than other 
chart products and may be current for several years. 
Helicopter Route Charts are updated as requested by 
the FAA. Scale 1 inch = 1.71 nm/1:125,000. 34 x 30 
inches folded to 5 x 10 inches. Revised biannually. 
(See FIG 9

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4.) 

FIG 9

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4 

Helicopter Route Charts 

b.  IFR Navigation Charts. 

1.  IFR En Route Low Altitude Charts 

(Conterminous U.S. and Alaska). 

En route low 

altitude charts provide aeronautical information for 
navigation under IFR conditions below 18,000 feet 
MSL. This four

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color chart series includes airways; 

limits of controlled airspace; VHF NAVAIDs with 
frequency, identification, channel, geographic coor-
dinates; airports with terminal air/ground 

communications; minimum en route and obstruction 
clearance altitudes; airway distances; reporting 
points; special use airspace; and military training 
routes. Scales vary from 1 inch = 5nm to 1 inch = 
20 nm. 50 x 20 inches folded to 5 x 10 inches. Charts 
revised every 56 days. 

Area charts

 show congested 

terminal areas at a large scale. They are included with 
subscriptions to any conterminous U.S. Set Low (Full 
set, East or West sets). 
(See FIG 9

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5 and FIG 9

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6.) 

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Types of Charts Available