Chapter 1 – System Description
SKY899 Pilot’s Guide
1-2
Preliminary
When installed as a
TAS
, the
SKY899
can share a
BFG
model
WX-1000/SKY497
monochrome display (
P/N
78-8060-5900-8
or
-
9
) with a
BFG
STORMSCOPE
®
model
WX-1000
using a remote
SKYWATCH/
S
tormscope
mode switch. As a
TAS
, the
SKY899
can
also display traffic on a growing number of
M
ulti-
F
unction
D
isplays (
MFD
s) and
E
lectronic
F
light
I
nstrument
S
ystem
(
EFIS
) displays from companies such as
A
vidyne,
G
armin, and
C
ollins, or on select
I
nstantaneous
V
ertical
S
peed
I
ndicators
(
IVSI
s) from
H
oneywell or
S
extant, or on a compatible weather
radar indicator via the
BFG
R
adar
G
raphics
C
omputer, model
RGC250
. Check with your dealer or with
BFG
for a current list
of approved alternate displays.
When installed as a
TCAS I
, the
SKY899
displays its traffic
information on a
TCAS I
-compatible
alternate
display as de-
scribed above, but
not
on the
WX-1000/SKY497
display.
Hereafter the word
display
refers to the
WX-1000/SKY497
display unless otherwise indicated. For any other display, refer
to that display’s manual for a description of how it displays
SKY899
traffic information.
Transmitter Receiver Computer (TRC)
The
TRC
is the primary unit of the
SKY899
. It converts signals
from the directional antenna and from other aircraft systems
into an on-screen picture of intruder aircraft locations, and if
necessary, aural traffic advisories. The
TRC
can track up to
35
intruder aircraft simultaneously, but to reduce clutter, the
SKY899
only displays the
8
most threatening intruders being
tracked. The
TRC
also has built-in test equipment to detect
faults and to verify proper operation.
Directional Antenna
The directional antenna transmits omnidirectional mode
C
interrogations and receives directional replies from other
transponder-equipped aircraft in the vicinity. The antenna also
receives
A
utomatic
D
ependent
S
urveillance-
B
roadcast (
ADS-B
)
mode
S
extended squitter broadcasts from intruder aircraft.
TRC & Antenna
