PFC CHECK ACO TH. 2025

What the definition of the Aeronautical Fixed Service ?

• A broadcasting service intended for the transmission of information relating to air navigation

• A telecommunication service provide for any aeronautical purpose

• A telecommunication service between specified fixed points provided primarily for the safety of air navigation and for the regular, efficient and economical operation of air service

• A telecommunication service between specified fixed points provided primarily for the safety of air navigation and for the regular, efficient and for fluently of messages

The text of the message entered by the AFTN origin station shall not exceed:

• 1800 characters in length

• 2100 characters in length

• 3700 characters in length

• 3600 characters in length

In the AFS, which of the following messages the highest priorty indicator ?

• Flight Safety Messages

• Urgency Messages

• Flight Regularity Messages

• Meteorological messages

The channel sequence number consists  of three digits from:

• 000 to 100

• 001 to 100

• 001 to 000(representing 1.000)

• 000 to 000(representing1.000)

The AFTN message format IA-5 shall comprise the following parts :

• Starting pulse, Origin, Text, Ending

• The Heading (Heading Line, Address, Origin), Text, Ending

• Address, Text, Ending

• Address, Origin, Text, Ending with the exception of the message separation signal

Channel-check transmissions. In the case where continuous control of channel condition is not provided the following periodic transmissions shall be sent at :

• H + 00, H + 20, H + 40

• H + 10, H + 30, H + 50

• H + 00, H + 30, H + 00

• Not Necessary

Message advice of immediate concern to an aircraft in flight is or the aircraft about to depart, the priority indicator is :

• FF

• DD

• KK

• SS

When an aeronautical station not receive flight plan, the station in need can send format ………message In AFTN

• Free Text

• RQN

• RQP

• Filling Flight Plan

A service message in the rejected retrieval AFTN that has a completely damaged address or no address at all, called :

• Unknown Address

• Address Corrupt

• Address Unknown

• Unknown

When the receiving station detects that a message has a Channel Sequence Number less than that expected, it should advise the previous station using a service message with a text as follows :

• SVC QTA MISS .....

• SVC QTA LR ..... EXP .....

• SVC QTA RPT .....

• SVC QTA OGN CORRUPT