Ramsey Electronics AM25 Manual de instrucciones descargar pdf (Pagina 6)

AR1 • 6

THOSE FAST-TALKING PILOTS AND CONTROLLERS!

We don't want you to blame the Ramsey AR1 if all you hear are short bursts

of words that don't make a lot of sense to you! Aviation communication is

brief, but it is clear and full of meaning. Usually, pilots repeat back exactly

what they hear from a controller so that both know that the message or

instructions were correctly interpreted. If you are listening in, it is hard to track

everything said from a cockpit, particularly in big city areas. Just to taxi, take

off and fly a few miles, a pilot may talk with 6 or 8 different air traffic

control operations, all on different frequencies, all within a few minutes! Here

are the meanings of a few typical communications:

"Miami Center, Delta 545 Heavy out of three-zero for two-five."

Delta Flight 545 acknowledges Miami Center's clearance to descend from 30,000

feet to 25,000 feet altitude. The word "heavy" means that the plane is a jumbo jet

such as 747, DC-10, etc.

"Seneca 432 Lima cleared to outer marker. Contact Tower 118.7."

The local Approach Control is saying that the Piper Seneca with the N-number

(tail number) ending in "432L" is cleared to continue flying an instrument approach

to the outer marker (a precision radio beacon located near the airport) and should

immediately call the airport radio control tower at 118.7 Mhz. This message also

implies that the controller does not expect to talk again with that aircraft.

"Cessna 723, squawk 6750, climb and maintain five thousand."

A controller is telling the Cessna pilot to set the airplane's radar transponder to

code 6750, climb to and fly level at an altitude of 5000 feet.

"United 330, traffic at 9 o'clock, 4 miles, altitude unknown."

The controller alerts United Airlines flight #330 of radar contact with some other

aircraft off to the pilot's left at a 9 o'clock position. Since the unknown plane's

altitude is also unknown, both controller and pilot realize that it is a smaller private

plane not equipped with altitude-reporting equipment.

ELECTRONICS & FLYING: DOING IT "BY THE NUMBERS"

As you settle down to build your AR1, step-by-step, you'll need to "do it by the

numbers", or the receiver won't work. As you look at the schematic and step-

by-step directions, you see that it's important to recognize parts values and

locations by the numbers. Be sure to take the time to do the job right.

A peek at the sample FAA "instrument approach" chart for medium-large

airports shows that pilots deal with many vitally important numbers and must

do so quickly. Among the numbers on that chart, can you find the air-ground

communications frequencies which can be heard on the AR1 receiver? Can

you find frequencies for uses other than communications?

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Ramsey Electronics AM25 Manual de instrucciones Pagina 6