Lynx
®
NGT-9000
Pilot’s Guide2-32
Operation - Panel Mount
Sensitivity Level A
Sensitivity level A consists of two criteria for displaying a TA:
1. The intruder aircraft enters into an area of airspace surrounding
ownship dened by a 0.2 nmi horizontal radius and a height of
±600 ft from ownship
2. The intruder aircraft approaches ownship on a course that will
intercept ownship within 15 or 20 seconds (within 15 seconds for
a non-altitude reporting intruder aircraft; within 20 seconds for an
altitude reporting intruder aircraft).
The unit uses sensitivity level A in the following situations (corresponds
to numbers 1, 2, 7, and 8 in Table 2-3):
1. Ownship has a valid AGL (above ground level) altitude and is
below 2,000 ft AGL. Note - The unit calculates height above
terrain using GPS Altitude and nearest airport elevation.
2. Ownship AGL Altitude is Invalid, and ownship ground speed is
available and is less than 120 knots.
TAS Sensitivity Levels
The A or B sensitivity level is used to determine when to display a
TA. Having two sensitivity levels allows the unit to reduce the number
of nuisance TAs during takeoff and landing (sensitivity level A), and
to maximize the detection of TAs during the cruise phase of ight
(sensitivity level B).
Sensitivity Level B
Sensitivity level B consists of two criteria for displaying a TA:
1. The intruder aircraft enters into an area of airspace surrounding
ownship dened by a 0.55 nmi horizontal radius and a height of
±800 ft from ownship.
2. The intruder aircraft approaches ownship on a course that
intercepts ownship within 20 or 30 seconds (within 20 seconds for
a non-altitude reporting intruder aircraft; within 30 seconds for an
altitude reporting intruder aircraft).
The unit uses sensitivity level B when the criteria for Sensitivity Level
A has not been met. (Corresponds to numbers 3, 4, 5 and 6 in Table
4-1).