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and PVOR modes of operation.
NAV Heading Page
The NAV Heading page allows control of the aircraft heading from
the FMS, while maintaining a display of information pertaining to the
current navigation leg. The page is accessed with the HDG line
select key on NAV page 1/1, the MANEUVER page or on the NAV
APPR page.
The heading mode in effect (HDG SEL or INTERCEPT) will be
displayed immediately below the page heading. The heading mode
displayed reflects the option selected using HDG line select key.
NOTE: The current nav leg may sequence due to maneuvering
the aircraft with repect to the flight plan.
Section V
Operations
5-44 2423sv602
Change 1
The data presented on the left side of the page is identical to the
data shown on NAV page 1 (Normal Nav) and can be altered using
the procedures described for NAV page 1. This data includes the
following:
CMD HDG - This is the heading which the FMS will use, as directed
by the heading mode selection made with the line select key
(INTERCEPT or HDG SEL). The cursor's "home position" is over this
entry field so that heading changes are more easily made. When
the page is first accessed, the current heading will be flashing. A
new heading may be entered or the ENTER key may be pressed to
confirm the current heading. When a new heading is typed into this
field, the FMS assumes the shortest direction of turn. This may be
changed to the long direction with the sign reversal key (±) or the
BACK key. After a new heading is entered, the ENTER key must be
pressed a second time for confirmation.
TURN R (or L) nnn° - Pressing R, L or ± key when cursor is over
CMD HDG field will result in display of “TURN R (or L) ______”.
Enter the number of degrees from current heading that it is desired
to turn (for instance TURN L 10°). In this example, 10° will be
subtracted from current heading, and the aircraft will turn to and roll
out on that new heading.
INTERCEPT / HDG SEL - This line select key is used to change the
heading mode in use. The line will read HDG SEL or INTERCEPT
depending upon the mode in use. If the Heading Select (HDG SEL)
mode is in use, INTERCEPT will be the selectable option and vice
versa. If the CMD HDG does not intercept the current navigation leg,
the INTERCEPT option will not be available and the line will read NO
INTCPT. The heading mode in use is displayed below the page title.
In the Heading Select (HDG SEL) mode, the FMS will follow the
commanded heading until changed or canceled regardless of the
active navigation leg. In the Intercept mode, the FMS will follow the
CMD HDG until intercepting the active navigation leg. When the
navigation leg is intercepted, the FMS will revert to normal
navigation and will again display NAV page 1.
Section V
Operations
2423sv602 5-45
Change 1
MNVR - Pressing this line select key will access the MANEUVER
definition page.
ARM APPR or ACT APPR - If an approach is linked into the flight
plan, this key will indicate ARM APPR when 50 nm from destination.
If ARM APPR is selected, the key will change to ACT APPR. The
reference navaid in the approach will be tuned. If ACT APPR is
selected, the flight plan will sequence to the INBOUND course of the
approach, and the FMS will automatically enter FHDG mode (if so
configured during installation).
CNCL HDG / RETURN - With CNCL HDG displayed, pressing this
line select key will immediately cancel the heading mode and the
FMS will provide steering to intercept the active navigation leg at a
45° angle. If the heading mode is not active, this line will read
RETURN and pressing the line select key will return the display to
the page previously displayed.
On Installations Interfaced with Collins C-14 or Compatible EFIS
Software,
There will be a two way interface with the Heading Bug. This
function allows the FMS to receive selected heading settings that are
driven from the heading select knob. These will appear in the
command heading window on the FMS. Conversely, when the FMS
is in Command Heading Mode, any entry on the FMS will be
received by the EFIS, and the heading bug will slew to that value. In
either case, the Flight Guidance System (FGS ) will fly these
headings when NAV is engaged.
Section V
Operations
5-46 2423sv602
Change 1
Holding Patterns
Holding patterns may be programmed by the pilot at a waypoint on
or off the flight plan. When they are part of a SID, STAR or Approach
they are included in the navigation data base. Holding patterns are
identified by ARINC 424 as HA, HF, and HM leg types. They are all
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