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from a Radio Reference Sensor (RRS); multiple long-range
navigational sensors; the Air Data Computer; and engine fuel flow
sensors.
Multiple Systems
In multiple system installations, an interconnection bus provides
communications between the FMSs. There is no “Master/Slave”
type relationship between the FMSs. Each system makes data
available (for example: Initialization, Flight Plan, Fuel) to other
interfaced system(s). Crossfill of this data can be initiated by the
sending or receiving system
Each system does; however, act as “Master” of its associated
sensors, even though that sensor may also be providing data to
another system. Typically, the on-side compass and air data
computer will supply heading and air data, while fuel flow data will be
shared by the systems.
Each FMS computes its own independent position using all available
navigation sensors and provides selected information to the
associated flight instruments. Each FMS also shares its best
computed position with the other system and continuously monitors
the other system's position output.
Section I
System Description
2423sv602
Change 1
1-18
Single UNS-1C and UNS-1Csp FMS Configuration
• Long range navigation sensors in various combinations (up to five
total)
Inertial Reference Sensors (IRS) or GPIRS - Maximum of three.
OMEGA/VLF Sensor System (OSS) or GPS/OSS - Maximum of
two.
Loran C Sensor (LCS) - Maximum of one.
GPS Sensor - Three (including internal GPS).
• Radio Reference Sensor (RRS) - One.
• Engine Fuel Flow Sensors - maximum of four;
• Air Data Computer (ADC) - One.
• Distance Measuring Equipment (DME) - One multi-channel digital
DME.
• VOR Receiver - One digital VOR.
• TACAN Receiver - One
• Radar joystick (not displayed) input for waypoint definition.
• Data Transfer Unit (DTU) - One.
• Doppler - One
Section I
System Description
2423sv602 1-19
Change 1
Dual UNS-1C and UNS-1Csp FMS Configuration
• Long range navigation sensors in various combinations (up to five
total)
Inertial Reference Sensors (IRS) or GPIRS - Maximum of three.
OMEGA/VLF Sensor System (OSS) or GPS/OSS- Maximum of
two.
Loran C Sensor (LCS) - Maximum of one.
GPS Sensor - Three including the internal GPS.
• Radio Reference Sensor (RRS) - One or two.
• Engine Fuel Flow Sensors - maximum of four;
• Air Data Computer (ADC) - One or two.
• Distance Measuring Equipment (DME) - Two multi-channel digital
DMEs.
• VOR Receiver - Two digital VORs.
• TACAN Receiver - Two.
• Radar joystick (not displayed) input for waypoint definition.
• Data Transfer Unit (DTU) - One
• Doppler - One
Section I
System Description
2423sv602
Change 1
1-20
Single UNS-1B/UNS-1D FMS Configuration
• Long range navigation sensors in various combinations (up to five
total)
Inertial Reference Sensors (IRS) or GPIRS - Maximum of three.
OMEGA/VLF Sensor System (OSS) or GPS/OSS- Maximum of
two.
Loran C Sensor (LCS) - Maximum of one.
GPS Sensor - Three including internal GPS.
• Radio Reference Sensor (RRS) - One.
• Engine Fuel Flow Sensors - maximum of four.
• Air Data Computer (ADC) - One.
• Distance Measuring Equipment (DME) - One multi-channel digital
DME.
• VOR Receiver - One digital VOR.
• TACAN Receiver - One.
• Radar joystick (not displayed) input for waypoint definition.
• Data Transfer Unit (DTU) - One.
• Doppler - One
Section I
System Description
2423sv602 1-21
Change 1
Dual UNS-1B/UNS-1D FMS Configuration
• Long range navigation sensors in various combinations (up to five
total)
Inertial Reference Sensors (IRS) or GPIRS - Maximum of three.
OMEGA/VLF Sensor System (OSS) or GPS/OSS- Maximum of
two.
Loran C Sensor (LCS) - Maximum of one.
GPS Sensor - Three including the internal GPS.
• Radio Reference Sensor (RRS) - One or two.
• Engine Fuel Flow Sensors - maximum of four.
• Air Data Computer (ADC) - One or two.
• Distance Measuring Equipment (DME) - Two multi-channel digital
DMEs.
• VOR Receiver - Two digital VORs.
• TACAN Receiver - Two.
• Radar joystick (not displayed) input for waypoint definition.
• Data Transfer Unit (DTU) - One.
• Doppler - One
Section I
System Description
2423sv602
Change 1
1-22
Single UNS-1K FMS Configuration
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