Systems Guide

Aerosoft
Airbus A320/A321
SYSTEMS
Systems guide
Vol
4
04-03-56
28 October 2014
NAVIGATION RADIOS
The navigation radios are set in the MCDU on the RADIO NAV page. You enter this page by pressing the RADNAV
key. Tuning to a station is as simple as entering the frequency (like 117.50) or the name (like SPA) on the
scratchpad and then clicking the button next to the radio you want to tune. If there is more than one station with
the same name or frequency the nearest is always selected.
GPWS
The Ground Proximity Warning System (GPWS) generates audio and visual warnings when the aircraft is in a
dangerous condition;
 Mode 1: Excessive rate of descent
 Mode 2: Excessive ground closure rate
 Mode 3: Altitude loss after takeoff
 Mode 4: Unsafe terrain clearance
 Mode 5: Excessive deviation from glide path
Note that some airports have approaches that will trigger the GPWS warnings. Be prepared for this.
RUNWAY AWARENESS AND ADVISORY SYSTEM
The Runway Awareness and Advisory System (RAAS) is designed to provide to crews information about the
aircraft's position relative to an airport's runway while operating at an airport. RAAS is a software upgrade to the
later-model Enhanced Ground Proximity Warning Systems. It is designed to prevent runway incursion incidents.
The RAAS is automatically triggered and does not have any user interface. See Vol1 for more information.
 Approaching Runway (on ground)
 Approaching Runway (in air)
 On Runway
 Runway End
 Taxiway Take-off
 Insufficient Runway Length