BendixKing KLN 90B - Manual (Page 139)

5-37 Rev 1
5.9.6 Going Direct-To A Waypoint While in the OBS
Mode
The direct-to function will select the OBS value that will
take the aircraft from the present position direct to the
active waypoint when the KLN 90B is interfaced to
EFIS, a compatible mechanical HSI interfaced through a
KA 90, or when the KLN 90B is not the displayed navi-
gation source on the external indicator.
If the KLN 90B is the displayed navigation source on a
non-driven HSI or a CDI it is not possible for the KLN
90B to change the OBS value. In these situations the
KLN 90B will provide a scratch-pad message that will
tell you what OBS value should be selected to go direct
to the active waypoint (figure 5-115).
5.9.7 Activating A Waypoint While In The OBS Mode
While in the OBS mode, you may activate another way-
point by using the normal Direct To method or by using
a second method. This second method activates
another waypoint without changing the selected course
(OBS). In other words, when the new waypoint is acti-
vated, the D-Bar is not recentered. In figure 5-116 the
KLN 90B is in the OBS mode and the selected course is
90°. You have just crossed INITT intersection and
desire to activate the next waypoint in the flight plan,
FINAL, without recentering the D-Bar.
1. Press D (figure 5-117). The rules described in
section 3.8, “DIRECT TO OPERATION”, dictate
which waypoint identifier will be initially displayed on
the Direct To page.
2. Press D a second time. The annunciation
DIRECT TO changes to ACTIVATE (figure 5-118).
The right side still displays the appropriate waypoint
page. Repeated presses of
D alternates between
DIRECT TO and ACTIVATE. Make sure ACTIVATE
is displayed.
3. Press E to approve the waypoint page and acti-
vate the waypoint (figure 5-119). The selected
course does not change, therefore this method does
not center the D-Bar like a Direct To operation.
5.9.8 Changing the CDI Scale Factor
The CDI scale factor can be changed by using either the
MOD 1 or MOD 2 pages. In normal operations it is
possible to select a CDI scale factor which is plus or
minus 5 NM, 1 NM or 0.3 NM full scale deflection. This
means that if the scale factor was ±1 NM and the needle
was deflected full scale to the right, the aircraft would be
1 NM left of course. The default CDI scale factor is ±5
NM. Figure 5-118
ACTIVATE: | FINAL
|REF: BTV
FINAL |RAD: 292.8^
|DIS: 11.7nm
|N 44^25.40'
|W 73^27.20'
CRSR enr:090 ent INT
Figure 5-119
3:GGT | =FINAL
4:BEGIN |+++·+i+++++
5:INITT |DIS 4.8nm
= 6:FINAL |GS 122kt
7:MMAPP |ETE :02
8:KHOM |BRG 088^
FPL 0 enr:090 NAV 1
Figure 5-116
3:GGT | =INITT
4:BEGIN |+++·+j+++++
= 5:INITT |DIS 0.4nm
6:
FINAL |GS 122kt
7:MMAPP |ETE :00
8:KHOM |BRG 275^
CRSR enr:090 NAV 1
Figure 5-115
| =GGT
|+++++i+·+++
|DIS 20.0nm
|GS 154kt
|ETE :08
|BRG 234^
$= CRS 234 NAV 1
Figure 5-117
DIRECT TO: | FINAL
|REF: BTV
FINAL |RAD: 292.8^
|DIS: 11.7nm
|N 44^25.40'
|W 73^27.20'
CRSR enr:090 ent INT