Line 7. BACKUP ON or BACKUP OFF is an alternate
action VAB selecting DNS BACKUP mode. DSPL KM or
DSPL NM is an alternate action VAB that permits switch of
DIST and GS only from KM/KPH to NM/KTS and back.
Line 8. Scratchpad.
c. HBCM Page.
The HBCM page, (fig 3-17), is
used to START and STOP the bias calibration of the DNS.
The 30-second automatic reversion to NAV top level page
is disabled when HBCM is selected. Refer to paragraph
3.15.c for HBCM operating procedures. The display has
Line 1. START is used to activate the HBCM calibration.
HBCM identifies the page. STOP is used to terminate the
Line 2. HBCM READY indicates the DNS is ready to
start the calibration sequence. HBCM ACTIVE, HBCM
GO, and HBCM NO-GO will also be displayed on the line
Line 3. Error messages pertinent loan HBCM condition
are displayed on this line.
Line 4. Blank.
Line 5. TIME XX:XX indicates elapsed time in minutes/
seconds for DNS computations of the bias calibration.
The timer will stop while the DNS is in memory during the
Line 6. Blank.
Line 7. Blank.
Line 8. Scratchpad. Not used in HBCM.
d. FDLS Page.
The FDLS page, (fig 3-18), is used
to initiate the On Command FDLS test function. The FDLS
page is selected by pressing the FDLS FAB. The FDLS
page has the following display.
Line 1 through Line 6. Blank.
Line 7. TEST initiates the On Command FDLS test for
the CDU and DNS.
Line 8. Scratchpad. Not used in FDLS.
e. FPLN Page.
The FPLN FAB selects the waypoint
coordinate dictionary pages. The first FPLN page (fig
3-19), displayed when the FPLN FAB is pressed is deter-
mined by the FLY TO selection on the NAV top level page.
1* 12S VN
FPLN Dictionary Page