Home' RTCA Documents for Review : DO-201B User Requirements for Navigation Data Contents ED-77A/DO-201BforOpenConsultation/FRAC
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A APPENDIX A
APPLICATIONS OF NAVIGATION DATABASES
The intent of this appendix is to familiarize and provide examples to the reader about
different applications that use navigation data. Such applications include Flight
Management Systems, Runway Safety, Navigation Displays, Landing Systems,
Flight/Mission Planning Systems, Simulation, and Radio Navigation/Communication
Systems. The appendix is organized in sections, A.1 through A.8.
FLIGHT MANAGEMENT SYSTEM
A Flight Management System (FMS) is an on-board computerized management system
that integrates aircraft performance and position information derived from navigation
sensors with stored navigation and flight plan details and Aeronautical Information
Service (AIS) data, together with manual inputs that provide piloting instructions. The
FMS provides the primary navigation, flight planning, optimized route determination, and
enroute guidance for the aircraft and normally consists of many interrelated functions.
Flight Management Systems range from simple point-to-point navigators to
sophisticated four-dimensional flight planning/guidance systems. In most aircraft today,
the FMS is the main component for current and future Communication Navigation
Surveillance/Air Traffic Management (CNS/ATM). The flight crew typically interacts with
the FMS via a Control Display Unit (CDU) or display-based interface. The FMS also
computes takeoff and landing information, performance algorithms, lateral and vertical
guidance, terminal, enroute, and approach procedures, functionality to operate in
Required Navigation Performance (RNP) airspace, and flight planning.
The FMS provides many advantages and benefits for the flight crew which increase the
safety of aircraft operations such as:
Automation of tasks
Reduced workload for the flight crew
Optimized flight routes and performance efficiency
More precise lateral and vertical navigation capabilities
Additional information for FMS can be found in ARINC 702A “Advanced Flight
Management Computer System”.
Flight Planning / Mission Planning
The basis of the FMS flight profile is the route, which the aircraft is supposed to fly from
the departure airport to the destination airport. Route data are typically extracted from
the FMC navigation database and typically consists of a departure airport and runway,
a standard instrument departure (SID) procedure, enroute waypoints and airways, a
standard arrival (STAR) procedure, and an approach procedure with a specific
destination runway. The flight planning function allows for flight and mission planning in
advance of and during the flight. Flight and performance predictions can be generated
in a separate stored flight plan or for the remainder of the active flight plan during flight.
With the overwhelming upgrades to navigation systems and fully integrated Flight
Management Systems (FMS) that are now installed in almost all corporate and
commercial aircraft, the need for reliable and consistent airborne navigation databases
is more important than ever.
Terminal, Enroute and Approach Procedures
The FMS uses a navigation database with published or tailored departures, airways,
arrivals, and approaches that can be selected and included in the flight plan. Terminal
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