and forecasts. For example: KBIX (Keesler Air Force
Base, Biloxi, Mississippi), KJFK (John F Kennedy
International Airport, New York City), and KLAX (Los
Angeles International Airport, Los Angeles, California)
are ICAO identifiers used both to identify the station
and weather products originated at the station.
Radio-navigation aids may be co-located at an
airfield or be located some distance away from an
airfield. These aids are identified by three-letter station
identifiers. In most, but not all cases, the radio
navigation aid identifier is the same as the airfields
national station identifier.
Converting Station Identifier To Location
Overseas ICAO identifiers may be cross-
referenced to WMO block/station numbers and
latitude/longitude by using the weather station catalog.
OPARS (U.S. Navy Optimum Path Aircraft Routing
System) subscribers may use the OPARS Data Base
computer listing of location identifiers to cross-
reference identifiers. The OPARS Data Base is the most
comprehensive listing of identifiers, and is available
either as a set of computer printouts, or is accessible via
the OPARS computer bulletin board.
For all stations in North America and for selected
Department of Defense overseas locations, FAA Order
7350.6, Location Identifiers, contains alphabetical
name to identifier cross-references as well as
alphanumeric identifiers to name cross-reference
The listings also include radio navigation
aids. The ICAO region identifier, K, is not considered
in this publication.
Latitudes/longitudes are not
For many countries, the DOD Flight Information
Publications (En route), IFR Supplement (Country
Name), provide alphabetical listings of airfield names
andnavigation aid names. Each airfield listing provides
the latitude/longitude, station elevation, and station
identifier, the time zone of the airfield, communication
frequencies, and navigation aid station identifiers and
What is the geographic definition of the tropics?
Why are great circle routes generally shorter
than straight line Mercator tracks?
Q10. Which of the following scales would show
greater detail; a 1:100,000 scale chart or a
1:10,000 scale chart?
GRAPHIC ENVIRONMENTAL PRODUCTS
LEARNING OBJECTIVES: Identify the terms
used to discuss graphic meteorological and
oceanographic products. Explain how legends
are used to identify information presented on a
Discuss how history is
displayed on a graphic product. Identify the
standard representation for various
meteorological parameters on graphic displays.
Identify each element in a plotted
What federal agency is responsible for
producing maps and charts for the U.S. military?
What publication contains a listing of available
weather plotting charts and hydrographic
What is the significance of a WMO block/station
number ending with the digit zero?
Where can a complete listing of WMO
block/station numbers be found?
What is the ICAO region identifier for the United
What publication contains a complete listing of
all station identifiers in North America?
The majority of meteorological and oceanographic
products in use are computer-produced graphic
products. While nearly all of these graphic products
may be reproduced on paper as a hard copy, they are
designed primarily to be used in an almost paperless
environment directly on a computer video display.
These graphics are commonly called charts-a
holdover from the time when everything was plotted on
weather plotting charts or maps-referring to the
geopolitical background used for location reference on
graphic weather products. Many types of information
may be transferred to the computer via radio, satellite
link, telephone modem, telephone facsimile, LAN, or
by mail or courier service on floppy or laser disk. The
graphic products received by any of these methods may
be in the form of digital data fields or actual graphics.
Most of the graphics received are intended to be nothing
more than "tools" for the forecaster to use to determine
the state of the current environmental conditions or the
anticipated state of conditions at some time in the