Mode 1 provides alerts for excessive descent rates with
respect to altitude AGL and is active for all phases of flight.
This mode has inner and outer alert boundaries as illustrated
in the diagram and graph below.
Penetration of the outer boundary activates the EGPWS
caution lights and "SINKRATE, SINKRATE" alert
messages will occur for each 20% degradation in altitude.
During the time that the Sinkrate aural is inhibited and the
alert lamp is ON, the Mode 5 aural "Glideslope" is allowed to
annunciate for excessive glideslope deviation below the beam.
Penetration of the inner boundary activates the EGPWS
warning lights and changes the audio message to "PULL UP"
which repeats continuously until the inner warning boundary
Note: "Pull Up" may be preceded by "Whoop, Whoop" in
some configurations based on the audio menu option selected.
Mark V and Mark VII EGPWS Pilot's Guide
Rev H, August 2011