Embraer EMB145, Operation Manual

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AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
REVISION 26
2-18-35
Page
1
Code
02
FLIGHT MANAGEMENT SYSTEM
The UNS-1K Flight Management System (FMS) controls a complete
range of navigation functions. Its primary purpose is to provide high
accuracy in long range lateral and vertical navigation. The system may
be installed with a single or dual configuration. Should the airplane
have a dual configuration, each unit can provide navigation data to the
other unit. For additional information on functions and operation, refer
to the manufacturer’s manual.
The FMS is mainly composed of four components:
−
Control Display Unit (CDU).
−
Navigation Computer Unit (NCU).
−
Data Transfer Unit (DTU).
−
Configuration Module (CM).
The FMS operates in the following situations: Oceanic, Remote, North
Atlantic Minimum Navigation Performance Specification Airspace,
Enroute, Terminal, Non-Precision Approach and Required Navigation
Performance 10.
The FMS interfaces with the followings systems and equipment:
−
GPS sensor(s), ADC 1 and 2 - The GPS receives satellite data
through the passive GPS antenna, processing and blending collected
data with ADC data and sends the resulting information to the FMS
computer.
−
AHRS/IRS 1 and 2 - Provides the necessary data to compute the
wind and for Dead Reckoning Mode, when the subsystem is not
capable of navigating by itself.
−
MFD and PFD - The FMS provides data for display navigation
guidance on the PFD and navigation map data on the MFD.
−
RMU 1 and 2 - The RMU interfaces with the FMS computer to
control the operating frequencies, modes and channels of the
various radios. For the dual configuration, each RMU supplies each
respective on-side NCU.
−
COM 1 and 2, NAV 1 and 2 - The FMS includes a radio-tuning page
on which the pilot can manually select the VHF NAV and COM
frequencies. Only the NAV frequency is fed back to the FMS
computer for verification of the tuning action. COM 1 and 2 interface
with FMS through the RMUs. The FMS can also automatically select
the NAV radio frequencies.
−
The FMS also provides latitude and longitude to TCAS.
The Control Display Unit (CDU), located on the control pedestal,
provides control functions management and operating modes for
proper FMS operation.