Radiotelephony

1. INTRODUCTION
A radiotelephone is a communication system for transmitting of speech over radio and is not necessarily connected with the public land line telephone network. It is a bipartisan radio system arranged for speaking and listening at a mobile station.
Radiotelephony, or phraseology is the language we use of goods and services to communicate on radio. To reduce the possibility of miscommunication and misunderstanding mingled with buffer storages and controllers it is used standart formats, terms, phrases and pronunciation such as the letters of the first principle in aviation english, standard phrases and numbers.

2. NUMBERS IN RADIOTELEPHONY
phone number                Pronunciation
0                              Zero                              
1                               One
2                               Two
3                               Tree
4                               Four
5                               Fife
6                               Six
7                               Seven
8                               Eight
9                               Niner
denary                  denary
Hundred                 Hundred
Thousand               Tousand

All numbers (with a some exceptions listed below) must be transmitted by pronouncing each human body separately. Also almost every numer transmitted to a pilot from ATC must be repeated back.





3.1. GENERAL NUMBERS

Type                        human body                  Transmitted as
Aircraft Reg.              N3456S                    November Tree Four Fife Six Sierra
Flight direct                FL 100                     Flight level One Hundred
Flight Level                FL 130                     Flight Level One Tree Zero
headland                     130 Degrees            One Tree Zero Degrees
Speed                         85 Knots                  Eight Fife Knots
Frequency                  121.85                      One Two One Decimal Eight Fife
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