737 Flight Crew Operations Manual
Flight Management, Navigation Chapter 11
Navigation Systems Description Section 20
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D6-27370-866-EGP 11.20.1
20 Navigation Systems DescriptionNavigation Systems DescriptionFile Highlight
Introduction
Navigation systems include the flight management system (FMS); global
positioning system (GPS); air data inertial reference system (ADIRS); radio
navigation systems (ADF, DME, ILS, marker beacons, and VOR); transponder;
and weather radar.
YK981 - YQ456
Many of the flight instrument display symbols listed in this chapter also appear on
the Heads Up Display (HUD) System. Refer to Chapter 10, Flight Instruments, for
HUD system display symbol descriptions.
Flight Management System
The flight management system (FMS) is comprised of the following components:
• flight management computer system (FMCS)
• autopilot/flight director system (AFDS)
• autothrottle (A/T)
• inertial reference systems (IRS)
• global positioning system (GPS).
Each of these components is an independent system, and each can be used
independently or in various combinations. The term FMS refers to the concept of
joining these independent components together into one integrated system which
provides continuous automatic navigation, guidance, and performance
management.
The integrated FMS provides centralized flight deck control of the airplane’s
flight path and performance parameters. The flight management computer, or
FMC, is the heart of the system, performing navigational and performance
computations and providing control and guidance commands.
The primary flight deck controls are the AFDS MCP, two control display units
(CDU’s), two electronic flight instrument system (EFIS) control panels, and an
FMC source selector switch. The primary displays are the CDUs, outboard display
units, inboard display units, and upper display unit.
September 15, 2016
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