AIM

8/15/19

9

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1

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10

Types of Charts Available

FIG 9

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1

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12

North Atlantic Route Charts

5. North Pacific Route Charts.

These charts

are designed for FAA controllers to monitor
transoceanic flights. They show established intercon-
tinental air routes, including reporting points with
geographic positions. Composite Chart: Scale
1 inch = 164 nm/1:12,000,000. 48 x 41

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1/2 inches.

Area Charts: Scale 1 inch = 95.9 nm/1:7,000,000.
52 x 40

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1/2 inches. All charts shipped unfolded.

Charts revised every 56 days. (See FIG 9

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1

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13.)

FIG 9

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1

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13

North Pacific Oceanic Route Charts

6. Airport Obstruction Charts (OC).

The

OC is a 1:12,000 scale graphic depicting 14 CFR
Part 77, Objects Affecting Navigable Airspace

,

surfaces, a representation of objects that penetrate
these surfaces, aircraft movement and apron areas,
navigational aids, prominent airport buildings, and a
selection of roads and other planimetric detail in the
airport vicinity. Also included are tabulations of
runway and other operational data.

7. FAA Aeronautical Chart User’s Guide.

A booklet designed to be used as a teaching aid and
reference document. It describes the substantial
amount of information provided on FAA’s aeronauti-
cal charts and publications. It includes explanations
and illustrations of chart terms and symbols
organized by chart type. The users guide is available
for free download at the AIS website.

e. Digital Products.

1. The Digital Aeronautical Information CD

(DAICD).

The DAICD is a combination of the

NAVAID Digital Data File, the Digital Chart
Supplement, and the Digital Obstacle File on one
Compact Disk. These three digital products are no
longer sold separately. The files are updated every
56 days and are available by subscription only.

(a) The NAVAID Digital Data File.

This

file contains a current listing of NAVAIDs that are
compatible with the National Airspace System. This
file contains all NAVAIDs including ILS and its
components, in the U.S., Puerto Rico, and the Virgin
Islands plus bordering facilities in Canada, Mexico,
and the Atlantic and Pacific areas.

(b) The Digital Obstacle File.

This file

describes all obstacles of interest to aviation users in
the U.S., with limited coverage of the Pacific,
Caribbean, Canada, and Mexico. The obstacles are
assigned unique numerical identifiers, accuracy
codes, and listed in order of ascending latitude within
each state or area.

(c) The Digital Aeronautical Chart Supple-

ment (DACS).

The DACS is specifically designed

to provide digital airspace data not otherwise readily
available. The supplement includes a 

Change Notice

for IAPFIX.dat at the mid

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point between revisions.

The 

Change Notice

 is available only by free

download at the AIS website.