AIM

4/3/14

9−1−7

Types of Charts Available

FIG 9

−1−8

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 AeroNav web site.

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−point between revisions.

The  Change Notice is available only by free

download from the AeroNav website.
The DACS individual data files are:
ENHIGH.DAT: High altitude airways (contermi-

nous U.S.)

ENLOW.DAT: Low altitude airways (conterminous

U.S.)

IAPFIX.DAT: Selected instrument approach proce-

dure NAVAID and fix data.

MTRFIX.DAT: Military training routes data.

ALHIGH.DAT: Alaska high altitude airways data.

ALLOW.DAT: Alaska low altitude airways data.

PR.DAT: Puerto Rico airways data.

HAWAII.DAT: Hawaii airways data.

BAHAMA.DAT: Bahamas routes data.

OCEANIC.DAT: Oceanic routes data.

STARS.DAT: Standard terminal arrivals data.

DP.DAT: Instrument departure procedures data.

LOPREF.DAT: Preferred low altitude IFR routes

data.

HIPREF.DAT: Preferred high altitude IFR routes

data.

ARF.DAT: Air route radar facilities data.

ASR.DAT: Airport surveillance radar facilities data.