Magnetic Variation - Honeywell KLN 900s Pilot's Manual

5.12 MAGNETIC VARIATION

The KLN 900's primary coverage area is from N 74° to
S 60° latitude as was shown in figure 3-1. Magnetic vari-
ation is automatically computed within this coverage
area when MAG VAR is in the AUTO mode on the SET
2 page (figure 5-134). All navigation data presented out-
side this area is automatically referenced to true North
unless a manual input of magnetic variation is made on
the SET 2 page. The following message will be dis-
played on the Message page:
MAGNETIC VAR INVALID
NAV DATA REFERENCED
TO TRUE NORTH
A user-defined magnetic variation may be entered on
the SET 2 page by turning the left cursor on; moving it
over the AUTO field on line 6 using the left outer knob;
turning the left inner knob to select USER; and finally
moving the cursor over the magnetic variation field and
entering the desired value using the left knobs.
When a user-defined magnetic variation of 0 degrees is
being used, the following message will be displayed on
the Message page:
NAV DATA REFERENCED
TO TRUE NORTH
When a user-defined magnetic variation other than 0
degrees is being used, the following message will be dis-
played:
NAV DATA REFERENCED TO
USER DEFINED MAG VAR
There are two exceptions when a user-defined magnetic
variation will not be used for navigation. When the active
waypoint is part of an approach procedure, the magnetic
variation for the published approach will be used and the
following message will be displayed:
MAG VAR FOR PUBLISHED
APPROACH BEING USED
Also, when the unit is in OBS mode and the active way-
point is a VOR, the published magnetic variation associ-
ated with the VOR station will be used and the following
message will be displayed:
MAG VAR FOR PUBLISHED
VOR BEING USED
NOTE: The above format for the SET 2 page applies to
ORS 02 and later software. ORS 01 software only allows
the selection of a user-entered magnetic variation when
the unit is outside of the primary coverage area, while
ORS 02 and later software always allows the user to
specify the magnetic variation.
DATE/TIME |
30 MAY 92|
14:59:28UTC|
CORD UNIV/Z|
MAG VAR:
AUTO 10^W|
SET 2
Figure 5-134
5-46
DATE/TIME |
30 MAY 92|
14:59:28UTC|
CORD UNIV/Z|
| MAG VAR:
USER: 10^W|
SET 2
Figure 5-135
|
Rev 2