Figure 5-3.-A279 copilot HSI control.
3. The COURSE selector switch selects the
source of course signals for display on the HSI. The
sources available for selection are VOR-2, VOR-1, or
TACAN. Selecting the TAC NAV REP position will
slave the copilot’s HSI to the pilot’s, provided the
BRG 2 switch is in the DA/DF position.
4. The BRG 2 selector switch selects the source
of the bearing signal for display on both the pilot’s
and copilot’s bearing pointer 2. The sources available
for selection are VOR-2, VOR-1, TACAN, ADF, or
DF. The DA/DF position will provide drift angle
information, if in radio navigation mode, or DF
signals, if in the tactical navigational mode.
A309 NAV/COMM HSI CONTROL BOX.—
The A309 control box (fig. 5-4) allows the
NAV/COMM operator to select the inputs to the HSI
at the NAV/COMM station. It also indicates certain
system malfunctions.
Refer to figure 5-4 when
reading the following text.
Figure 5-4.-A309 NAV/COMM HSI control box.
5-3
