Aeronautical Charts

An aeronautical chart typically is a pictorial representation of a portion
of the actual earth’s surface upon which lines and in addition symbols within a
variety of colors represent qualities or details seen found on the
earth’s surface. With regard to addition to be able to ground image, numerous additional
symbols and notes tend to be added to indicate navigational aids
(NAVAID) not to mention data required for air navigation. Properly
utilized, a chart typically is a vital adjunct with navigation; improperly employed,
it can become a hazard. Without it, modern navigation would
never currently have reached its present state of development. Because
of their marvelous importance, the navigator should be thoroughly
familiar with the wide variety of aeronautical charts and even
recognize their many uses.
Lambert Conformal
Aeronautical charts are really produced on countless different types of
projections. Since the actual demand for wide array in charts is and so amazing
not to mention the actual properties of the actual projections fluctuate greatly, there is no
specific projection satisfying all the navigation requirements. The projection
which most almost answers all the of the navigator’s problems typically is
the Lambert conformal, not to mention this projection can be the it many
widely used for aeronautical charts. An aeronautical chart of
a couple projection and in addition scale is obtained for any kind of portion
of the particular earth.
Datums
Maps created by a given country traditionally make use of the particular datum
built by that country. There can be because lots of as a thousand
of these numerous datums used throughout the planet. Inherent
problems result from over a hundred countries utilizing widely
different methods and in addition standards to be able to measure coordinate
systems. When added to be able to the particular effects of local variations in
topography and in addition the gravity field, systems are really built which
differ substantially from each different. These individualized
datums tend to be classified because surrounding and / or territorial.
Scale
Obviously, charts are a lot smaller than the area they
represent. The ratio between any kind of provided unit of length on a
chart as well as the actual true distance it represents found on the earth typically is the
scale of the chart. The scale varies, and also could differ greatly from
1 part of the actual chart with an additional. Charts are generally prepared in order to various
scales for different purposes. If a chart is in order to show the actual whole
planet and yet not be too large, it should be drawn with little
scale. If a chart can be in order to show a lot detail, it should be drawn to
a large scale; then it shows a smaller area than does a chart
of the particular same size drawn to a small scale. Remember, large
area, small scale; small area, large scale.
Aeronautical Chart
The particular scale of a chart may be given by a simple statement, such
as 1 inch equals 10 miles. This particular means a distance of 10 miles
on the earth’s surface can be shown 1 inch long on the chart. On
aeronautical charts, the scale is actually indicated inside you of two ways:
representative fraction or alternatively graphic scale.

Aeronautical Information
With regard to the aeronautical category, coded chart symbols denote
airfields, radio aids with navigation, commercial broadcasting
stations, Air Defense Identification Zones (ADIZ),
compulsory corridors, restricted airspace, warning notes,
lines of magnetic variation, and also special navigational grids.
Certain aeronautical details is case to be able to frequent change.
For economy of production, charts are really retained throughout stock for
different periods of time. In order to keep the charts current, just the particular
stable kinds of information are really printed on navigation charts.
NGA produces and also distributes almost all aeronautical charts and in addition Flight
Details Publication (FLIP) documents. A summary of the particular
typical charts is in Figure 1-33. Requisitions will need to indicate
item identification and also terminology for every item requested
as listed within the catalog. List aeronautical charts by series with regard to
numerical and / or alphabetical sequence; list FLIP documents by
type (en route, planning, terminal), title, plus geographic area of
coverage. Contact NGA or perhaps its squadrons and also detachments for
technical assistance with regard to preparing statements of requirements.
Addresses are generally listed inside the NGA Catalog of Maps, Charts, not to mention
Connected Treatments.