AIP
ASECNA
SÉNÉGAL
13 ENR 1-6-07
13 NOVEMBRE 2014
CONTROLLER PILOT DATA LINK COMMUNICATION (CPDLC) USED AS BACK UP IN DAKAR UTA
1.- INTRODUCTION
In the framework of the improvement of Air Traffic Services provided to the users, Controller-Pilot Data Link Communications (CPDLC) will be
used in Dakar UTA as back up in case of unavailability of VHF frequencies.
The ATS Data Link communication is provided to all equipped aircraft in accordance to PANS/ATM 501 (Doc.4444) and Global Operational Data
Link Document (GOLD).
Validity area
- Horizontal limits:
From 19°10'N- 018°45'W point, follow DAKAR FIR/CANARIAS limits until 19°00’N- 19°00’W point.
Then, continue until 19°50'N-020°00'W point, descent along 020°00’W parallel until DAKAR FIR/SAL limits to join 15°00'N-020°00'W point.
From this point, join 12°58'N-021°22'W point, and follow DAKAR OCEANIC FIR/DAKAR TERRESTRIAL limits until 09°00'N-016°55' W point.
From this point, follow DAKAR TERRESTRIAL FIR/ROBERTS limits until 10°53'N, 015°05'W point, follow the common boundaries between
BISSAU GUINEA and CONAKRY GUINEA until 12°41'N- 013°39' W point.
Then, continue along the common boundaries between CONAKRY GUINEA and SENEGAL until 12°26'N- 012°30'W point, follow BAMAKO
UTA limits until 15°18'N- 011°49'W point.
From this point, join 14°45'N- 012°26'W point, the follow the common boundaries between SENEGAL and MAURITANIA until 16°29'N016°18'W and join Arc of circle of 120NM radius based on "YF" VOR/DME until 16°37'N-018°31'W point.
From this point, back to 19°10'N-018°45'W point.
- Vertical limits: from FL 245 to FL460.
2.
PROCEDURE FOR COMMUNICATION WITH DAKAR ACC
- VHF frequencies will be the primary means of communication;
- CPDLC will be used as back up (for CPDLC equipped aircraft)
Addresses:
- Dakar ACC call sign: Dakar Control
- ACARS Dakar Address: DKRCAYA
- ATS messages shall be sent to addressees according to existing procedures.
2.1 A CPDLC connection established between an aircraft and Dakar CONTROL is either active or non-active.
- A connection is active when CPDLC messages can be exchanged;
- A connection is non-active when CPDLC messages cannot be exchanged.
Equipped aircraft can have two (02) CPDLC connections established, each with a different ATSU. Only one of these connections can be active
at any given time. A non-active connection becomes active as soon as the active connection is terminated.
2.2 The controller or pilot shall construct CPDLC messages using the pre-formatted message set, a free text message or a combination of both.
2.3 Free text messages shall be used only when an appropriate pre-formatted message is not available, so the following shall be observed:
a) format and phraseology shall be in accordance with the ATC standard;
b) non essential words and sentences shall be avoided;
c) abbreviations shall be included only when in accordance with the standard ATC phraseology.
2.4 In case of using free text messages, preference shall be given to Standardized Free Text Messages outlined in Global Operational Data Link
Document (GOLD).
2.5 Pilots shall downlink a CPDLC position report (ATC waypoint) to the next ATS unit after the completion of:
a) An initial CPDLC connection (when inbound from an area not providing CPDLC services), or during a connection transfer;
b) Either when the CPDLC connection transfer has been completed; or at the associated FIR boundary.
SERVICE DE L’INFORMATION
AÉRONAUTIQUE - A S E C N A
AMDT 12/14