4. RAHROSHD The Air Traffic Management Solution for Effective Controlof Oceanic Airspace

5. RAHROSHD The Air Traffic Management Gander Automated Air Traffic System (GAATS) A Proven Oceanic Airspace Management System The Gander Automated Air Traffic System (GAATS) is NAV CANADA’s proven oceanic ATC system that services the world's most heavily travelled oceanic airspace - the North Atlantic. This system has matched a steady progression of proven technologies to increasing oceanic air traffic needs. The result is a mature, well-established system that provides safe and efficient air traffic services, and can be adapted to any oceanic environment. GAATS, a sophisticated, rules-based ATC system is designed to deal with the complexities of managing both random route and track-based traffic. Of the over 1,000 flights per day handled by GAATS, approximately 60% use the North Atlantic Organized Track (OTS). The other 400 flights per day – more than the total daily traffic of most oceanic environments - are random, off-track traffic. GAATS’ traffic management capabilities are achieved through the tight integration between air traffic, airspace and weather models, combined with a proven conflict probe. Operational flexibility and workload balancing under changing traffic situations are further enhanced through dynamic sectorization. This advanced functionality allows NAV CANADA oceanic controllers and planners to routinely grant customer-preferred routes and flight profiles, and to manage complex crossing situations. SYSTEM OVERVIEW GAATS is designed to deal with any combination of random route and track-based traffic. This modern oceanic system ensures efficient presentation of flight data to controllers, accurate route-time calculations based on time-aligned weather models, and reliable conflict detection and alerting. It also facilitates automatic assignment of route numbers, conformance monitoring of all aspects of flight progress, dynamic sectorization and electronic flight data exchange with aircraft and adjacent Flight Information Regions. Conflict Prediction The automated conflict probe is the key tool that allows oceanic controllers to keep up with traffic growth. The conflict probe is used to validate all proposed clearances. GAATS also monitors the actual traffic situation in order to ensure that the separation is maintained at all times. Algorithms are regularly updated to reflect new standards defined in "Application of Separation Minima - North Atlantic Region". All separation standards defined in the (4th) Edition are supported, including Basic, MNPS, RVSM, and Composite, with the algorithms differentiating between turbo jet, SST and propeller-driven aircraft. Conflict detection includes aircraft-to- aircraft and aircraft-to-special-useairspace, both stationary and moving. Conformance Monitoring GAATS automatically compares controller inputs and position reports against current flight profiles and generates alerts to the responsible sector controllers in the event of discrepancies. It also provides overdue position report alerting. Integrated ADS/CPDLC Processing ADS (Automatic Dependent Surveillance) position reports and CPDLC (Controller- Pilot Data Link Communications) messaging are tightly integrated into the GAATS architecture. This approach enables controllers to focus on controlling and providing service to aircraft, rather than on additional administrative tasks. ADS contracts are established automatically by GAATS using configurable time and distance paramenters from the oceanic boundary. Controllers can override these contracts and also initiate an on-demand contract. ADS position reports are automatically monitored for conformance, with controller action required only in the event of conformance discrepancies or late reports.

6. RAHROSHD The Air Traffic Management CPDLC capabilities support the complete downlink FANS-1/A message set. Incoming CPDLC messages are automatically distributed in accordance with the current sectorization. Responses to pilot CPDLC clearance requests are generated automatically from the controller-initiated Trial Probe Command and presented for approval and editing before being sent. This automatic composition of the CPDLC uplink responses to clearance requests is essential for efficiency in a busy oceanic environment. In addition, controllers can manually create non-clearance CPDLC messages. Dynamic Sectorization Fully adjustable sectorization is available in four specific areas: Ocean Planner Low Domestic High Domestic Altitude and geographic boundaries define oceanic sectors. Sector boundaries are completely dynamic. Supervisors can consolidate or divide sectors, after which all pertinent information is redistributed automatically. GAATS assumes automatic aircraft hand-off between sectors based on sector boundaries. An override capability permits controllers to modify a flight in another control sector, in essence creating multi-controller access. Traffic Flow Management Organized Track Tools Minimum Time Tracks (MTT) are calculated for major traffic axes or between any two points and are displayed at the workstation. GAATS allows the entry of an organized track structure which can be distributed via AFTN (Aeronautical Fixed Telecommunication Network). Flow Metering Supervisors can request reports of traffic that will enter or exit oceanic airspace. Statistics GAATS provides a means for retrieval and storage of saved flight statistics, which are later used for

7. RAHROSHD The Air Traffic Management GAATS Workstation The GAATS workstation consists of a client side Flight Plan Processor (FPP) and the GAATS Situation Display (GSiT). GSiT increases controllers' situational awareness by providing the following display features: situation display integrating radar, ADS and flight plan data with zoom and pan capabilities multiple Present Position Symbols (PPS) for display of track positions projected route timelines conformance alerts conflict alerts showing loss and regain of separation Range Bearing Lines (RBL) between aircraft or between aircraft and static points Predicted Track Line (PTL) Predicted Intercept Vector (PIV) auto-tag swap of flight data tags using multiple positions and leader length optional halo on target for highlighting user-selectable geographical maps with multiple overlays independent, user configurable inset/situation windows with capability to set up, save and recall user-configurable data filtering, based on flight level, flight state and controller role user-configurable brightness and fonts for mapsand data tags SYSTEM ARCHITECTURE GAATS is an open and scalable system based on Commercial-Off-The-Shelf (COTS) products. System configuration is flexible and can be tailored easily to meet air traffic control requirements in any environment. Hardware Compaq Alpha 1000A Processors (master/hot standby) with automatic switchover 128 ports for input/output devices and datalinks Networks Dual FDDI rings with dual attached workstations Ethernet Software Operating System VMS Pascal (Application Code) Configuration Management System clearVISN© Network Management

8. RAHROSHD The Air Traffic Management GAATS Workstations Hardware Hewlett Packard C360 RISC Processor Barco Graphics Card Sony 2K x 2K monitor DLT 7000 digital recorder (70 GB) Software Operating System HP UNIX Display Software Gallium InterMAPhics (graphical library) ANSI C (Application Code) Motif (user GUI interface) HP Open View