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4-7
Rev 1
4.2 OPERATING FROM THE ACTIVE
FLIGHT PLAN
4.2.1 General Procedures
Everything you have learned in this Pilot’s Guide thus far
is applicable to using the KLN 90B for flight plan opera-
tion. The following rules and considerations apply for
flight plan operation while the KLN 90B is in the Leg
mode:
•Although any of the KLN 90B pages may be utilized
while operating along a flight plan, common page
selections are the FPL 0 page on the left side while
simultaneously displaying one of three Distance/Time
pages (D/T 1, D/T 2, D/T 3) or the NAV 5 page (navi-
gation graphics) on the right side. The information
contained on the Distance/Time pages is explained
later, beginning in section 4.2.5, “The Distance/Time
Pages”. The Super NAV 5 page is especially useful
for flight plan operation. It provides you with a visual
orientation of your position in the active flight plan and
displays the alphanumeric identifiers of the flight plan
waypoints. Of course the other four Navigation pages
may also be used extensively. Now would be a good
time to take a couple of minutes and review the NAV 5
and Super NAV 5 pages as they relate to flight plan
operation (see sections 3.9.6 and 3.9.7).
•Always verify that you are viewing the active flight plan
page (FPL 0) and not one of the other numbered flight
plan pages.
•The active leg of the flight plan is designated with a ∑
symbol. A leg is defined as the course line between a
pair of waypoints (a “from” waypoint and a “to”
waypoint). The head of the arrow is positioned to the
left of and points to the active “to” waypoint. In figure
4-29, GPTis the “to” waypoint. The tail of the ∑sym-
bol is positioned to the left of the “from” waypoint.
KNEWis the “from” waypoint in figure 4-29. The ∑
symbol is not displayed unless the KLN 90B is actually
receiving navigation signals suitable for navigation.
(Note: If the unit is in the take-home mode, it has
been “tricked” into thinking it is receiving signals and
therefore the ∑symbol can be displayed). Also, the ∑
symbol will not be displayed if Direct To navigation is
occurring. If in doubt as to whether or not Direct To
operation is occurring, view the NAV 1 page. If the top
line shows the Æsymbol (figure 4-30) instead of a
“from” waypoint (figure 4-31), then Direct To navigation
is occurring. If it is desired to cancel the Direct To
operation and operate from the active flight plan; press
D, then press @, then press E.
•As flight plan waypoints are reached, the active leg
symbol automatically orients itself on the next leg.
; 1:KNEW |
< 2:GPT |
3:SJI |
4:CEW |
5:MAI |
8:KPIE |
FPL 0
Figure 4-29
$=KHOU |
+++++Ê+++++|
DIS 278nm|
GS 182kt|
ETE 1:32|
BRG 264^|
NAV 1
Figure 4-30
KNEW =GPT |
+++++Ê+++++|
DIS 52.4nm|
GS 182kt|
ETE :18|
BRG 065^|
NAV 1
Figure 4-31