INTRODUCTION
The Radio Navigation System contains the radios and controls used for navigation purposes. Included in these systems are
Terrain Awareness Warning System (TAWS), transponder, VHF navigation radios, weather radar, radio interface unit
(RIU), displays and controls with FMS, Radio Communication, GPS, and TCAS.
Two separate systems are provided for radio navigation. They are designed and installed so that the failure of one system
does not preclude the operation of the other system. Both are connected to the on-side and cross-side cockpit displays and
controls.
Equipment, controls and wiring are designed and installed so that the operation of any of the system components will not
adversely affect or will not be adversely affected by the simultaneous operation of any other radio or electronic unit
or system.
The Challenger 300 is equipped with conventional navigation systems as follows:
- Integrated Navigation Receivers
- Distance Measuring Equipment
- Automatic Direction Finder
RADIO INTERFACE UNIT (RIU)
The left and right Radio Interface Units are located on their respective equipment racks forward of the entry door.The RIUs
accommodate data concentration, communications and audio management, and control functions. The RIU provides an in-
terface between the radios and the rest of the aircraft systems and equipment. They receive inputs from TAWS and TCAS
and distribute digital audio signals from the audio control panels (ACPs).
REV 1
Challenger Global 300 - Navigation
Page 1
