BendixKing KLN 89B - Pilots Guide - Manual (Page 128)

4.4. ADVISORY VNAV OPERATION
The KLN 89(B)’s advisory vertical navigation (VNAV) feature allows
you to program a descent or ascent path, and then provides you with
an advisory altitude to fly that will provide guidance along the vertical
path. For example, you can program the VNAV to provide descent
guidance so that you arrive at your active waypoint or a waypoint in
the active flight plan at an altitude that you specify. The KLN 89(B)
will alert you of when to start the descent, and display the advisory
altitudes to fly throughout the descent.
4.4.1. VNAV FOR DIRECT TO OPERATION
The Altitude 2 (ALT 2) page is used to program the KLN 89(B) for
vertical navigation. To get to the ALT 2 page from any non-altitude
page, press the
A button twice. The following example will be used
to illustrate how to use the VNAV feature. You are using the KLN
89(B) to fly direct to your destination airport, Dubuque Municipal air-
port (KDBQ) located in Dubuque, Iowa. You are presently about 65
nautical miles west of Dubuque, flying
at 7500 feet MSL (figure 4-58). You
desire to use the VNAV to provide
vertical guidance to Dubuque’s traffic
pattern altitude of 1900 feet MSL
To use VNAV on a Direct To:
1. Select the ALT 2 page by
pressing the
A
button twice
(figure 4-59). The aircraft’s actu-
al altitude (7500 feet) is displayed
on the left side of line 2. If the
displayed altitude is incorrect it is
probably because you have not
recently updated the KLN 89(B)’s altimeter baro setting on the
ALT 1 page (see section 3.3).
NOTE: There may be some difference (less than 100 feet) between
the indicated altitude and the aircraft’s actual altitude if the altitude
input to the KLN 89(B) is from an altitude encoder because these
encoders only provide altitude in 100 foot increments.
The identifier for the active waypoint (KDBQ) is automatically dis-
played on the ALT 2 page. Prior to programming a VNAV operation,
the top of the page displays that the VNAV is inactive (Vnv Inactive).
KLN 89/KLN 89B Pilot’s Guide Advanced GPS Operation
4-17
Advanced GPS Operation
Chapter 4
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
ñî.ònm| ∂∆ KDBQ
145kt|> ªªªª∑ºπªªªª
>Leg|DTK 094° TK 093°
NAV 1 |>094°To 0:27
Figure 4-58
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
åå.ånm|Vnv Inactive
ееееее| 07500 to :00000
Leg|KDBQ : -00nm
*CRSR*|GS: 130 -0500fpm
Figure 4-59