Skywatch SKY497, Pilot'S Manual

Page: 37 / 52

SKY497 Pilot’s Guide 4-1
Principles of
Operation
C h a p t e r 4
Introduction
This chapter describes
T
raffic
A
dvisory (
TA
) criteria and other
factors that affect the display of traffic symbols. Table
4-1
summarizes the criteria necessary for the
SKY497
to display a
TA
.
Sensitivity Level A Sensitivity Level B
The SKY497 Will Issue a Traffic Advisory…
No.
If Your
Aircraft…
And Your
Aircraft’s
Altitude Is…
And Your
Landing
Gear Is…
And An Intruder
Aircraft Is Detected…
1 has a radio
altimeter*
below 2000 ft
AGL
within a 0.2 nmi horizontal
radius and a ±600 ft relative
altitude
2 within 15–20 sec. of
CPA**
3 above 2000 ft
AGL
within a 0.55 nmi
horizontal radius and a
±800 ft relative altitude
4 within 20–30 sec. of
CPA**
5 does not
have a radio
altimeter*
down within a 0.2 nmi horizontal
radius and a ±600 ft relative
altitude
6 within 15–20 sec. of
CPA**
7 up within a 0.55 nmi
horizontal radius and a
±800 ft relative altitude
8 within 20–30 sec. of
CPA**
9 fixed within a 0.55 nmi
horizontal radius and a
±800 ft relative altitude
10 within 20–30 sec. of
CPA**
Table 4-1. Ten Situations in Which a TA Will Occur
* Having a radio altimeter means having a compatible radio altimeter wired to the
SKY497
and providing valid altitude information.
**
CPA
means
C
losest
P
oint of
A
pproach.