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5-44
5.12 OPERATION OUTSIDE THE PRIMARY
COVERAGE AREA
The KLN 90B’s primary coverage area is from N 74°to
S 60°latitude as was shown in figure 3-1. All navigation
data presented outside this area is automatically refer-
enced to true North unless a manual input of magnetic
variation is made on the SET 2 page. The same is true
anytime the KLN 90B is in the OBS mode and the active
waypoint is outside the primary coverage area. Under
both of these conditions, the following message will be
displayed on the Message page:
MAGNETIC VAR INVALID
ALL DATA REFERENCED
TO TRUE NORTH
When navigation is within the primary coverage area,
the SET 2 page does not display magnetic variation (fig-
ure 5-133). However, under the conditions stated
above, a user entered magnetic variation may be made
on line 6 of the SET 2 page using the left Cand left
set of knobs (figure 5-134).
5.13 OPERATION WITHOUT A DATABASE
CARTRIDGE
The KLN 90B is designed so that a database cartridge
is required for normal operation. However, in the event
that the cartridge is inadvertently not inserted or that the
cartridge fails, there is a reversionary mode providing
partial operation that may be used.
NOTE: Reversionary operation without a database
cartridge should only be used for VFR flight, not for IFR.
Without a database cartridge inserted, the Database
page appears as in figure 5-135. All published
waypoints (those that originated from the database
cartridge) have been deleted from the active flight plan,
FPL 0. Therefore, the only waypoints remaining in FPL
0 are any user-defined waypoints that were originally
included in the flight plan.
The KLN 90B is unable to calculate magnetic variation
without the database cartridge. Therefore, a magnetic
variation must be manually inserted on the Database
page when there is no cartridge. Use the right inner and
outer knobs to enter the desired magnetic variation and
press Eto enter (figure 5-136). With the cursor posi-
tioned over ACKNOWLEDGE?,press Eto approve
the Database page. The magnetic variation can be
entered on the Database page and on line 6 of the SET
2 page (figure 5-134).
Rev 1
Figure 5-133
Figure 5-134
DATE/TIME |
|
30 MAY 92|
14:59:28UTC|
CORD UNIV/Z|
|
SET 2
DATE/TIME |
|
30 MAY 92|
14:59:28UTC|
CORD UNIV/Z|
MAG V 10^W|
SET 2
Figure 5-135
NO DATA BASE
CARTRIDGE PRESENT
PUBLISHED WPTS HAVE
BEEN DELETED FROM FPL 0
MAGNETIC VARIATION:!!^!
ACKNOWLEDGE?
enr-leg CRSR
NO DATA BASE
CARTRIDGE PRESENT
PUBLISHED WPTS HAVE
BEEN DELETED FROM FPL 0
MAGNETIC VARIATION:06^E
ACKNOWLEDGE?
enr-leg CRSR
Figure 5-136