getting to grips with surveillance(121)

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- Pakistan airspace: Most of the Pakistan airspace is radar covered. However, some gaps in the west and northern mountain regions, as well as in the south seaward part of the country, remain. ADS-B is considered to fill in these gaps. Trials are expected to start in late 2008 or early 2009.
A.4.2. WEBSITE
For more details, please refer to the materials of the Automatic Dependent Surveillance – Broadcast (ADS-B) Seminar and The Meeting Of ADS-B Study and Implementation Task Force available at http://www.icao.or.th/welcome.html (click on the desired year of the MEETING SCHEDULE frame in the middle of the left panel, then search for the ADS-B SITF meeting).

A.5. ADS-B NRA IN THE HUDSON BAY (CANADA)
A.5.1. DESCRIPTION
In July 2006, NAV CANADA announced its intention to implement ADS-B over the Hudson Bay by the end of 2008 (refer to Transport Canada AIC 18/07, see References). At the time of writing the brochure, 35 000 flights a year crossed the Hudson Bay without surveillance services. NAV CANADA retained ADS-B as the solution to fill in the surveillance gap in this area. ADS-B presents significant benefits compared to SSR in terms of quality, reliability and costs, but it also requires operators crossing this area to be equipped with appropriate avionics.
In 2007, 50 to 60% of the traffic over the Hudson Bay were technically capable to broadcast ADS-B data. IATA expects this portion of traffic to increase up to 90% in 2010.
NAV CANADA currently leads a consultation with its customers in order to prepare the implementation of ADS-B over the Hudson Bay. First operational ADS-B services started in January 2009.
Transport Canada plans an ADS-B mandate over the Hudson Bay in mid 2009 above FL 350.
Five stations are planned in the Hudson Bay: Rankin Inlet, Churchill, Fort Severn, Povungnituk and Coral Harbor (white areas in Figure A - 2).
In the future, NAV CANADA plans to expand ADS-B to the Canadian Atlantic coast (yellow areas in Figure A - 2), the Gander airspace over Greenland (magenta areas in Figure A - 2), and eventually over the entire country.

A.5.2. WEBSITE
For more details, please refer to:
http://www.navcanada.ca/NavCanada.asp?Language=en&Content=ContentDefinit ionFiles%5CServices%5CANSPrograms%5CADS-B%5Cdefault.xml

APPENDIX B – ADS-B PHRASEOLOGY
The following table provides an overview of the ADS-B phraseology as per the ICAO Doc 4444 – PANS ATM, 15th Edition, 2007, Chapter 12 – Phraseologies (see References).
Note: The implementation of ADS-B operations may locally change. Refer to AIP for specific regional procedures.
Circumstances  Radar  ADS-B 
12.4.1.10. Termination or Radar or ADS-B service  RADAR SERVICE TERMINATED [DUE (reason)] (instructions)  IDENTIFICATION TERMINATED [DUE (reason)] (instructions) 
12.4.1.11. Radar or ADS- SECONDARY RADAR  ADS-B OUT OF 
B equipment degradation  OUT OF SERVICE (appropriate information as necessary) PRIMARY RADAR OUT OF SERVICE (appropriate information as necessary)  SERVICE (appropriate information as necessary) 
　
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