IRS Status Display
Displays the IRS currently selected for use in navigation. “L” or “R” indicates left or right, and “2” indicates dual system with both IRSs are used in the FMC position calculation.
Non-Scanning DME in Agility Tuning Mode
Agile Tuning
During agility tuning, the corresponding VOR or ILS field (1L or 1R) blanks.
The identifiers and frequencies being used for the navigation solution are displayed simultaneously on Lines 2L or 2R.
Navigation Options (U7 and on)
When a navigation facility or internal system is invalid, the invalid data must be
inhibited to prevent incorrect position calculations.
Access to the NAV OPTIONS page is from the NAV OPTIONS prompt on the
REF NAV DATA page or by selecting NEXT or PREV PAGE on the NAV
STATUS page.
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December 6, 2002 11.42.49
Flight Management, Navigation -FMC Cruise 737 Operations Manual
DME/VOR INHIBIT
Enter the identifier of up to two VOR, VOR/DME, VORTAC, or DME stations
that must not be used for FMC position updates.
Entries are blanked at flight completion.
Deleting or overwriting removes a previous inhibit.
On airplanes with scanning DME, VOR Inhibit feature is not available.
DME/VOR UPDATE
Selection permits switching between ON and OFF modes for updating FMC
position. Default mode is ON. The current mode is highlighted in reverse video.
(U10.2 and on) Selected mode is also displayed in large font and non–selected
mode is displayed in small font.
Selection is reset to ON at flight completion.
On airplanes with scanning DME, VOR Update feature is not available.
Fix Information Page
Two identical FIX INFO pages are used to identify waypoint fixes for display on the EFIS map. If desired, fix information can be copied into the RTE page. Access is via the FIX key.
Copyright . The Boeing Company. See title page for details.
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Flight Management, Navigation -FMC Cruise 737 Operations Manual
FIX Name
Enter the desired fix.
Valid entries are airports, navaids, and waypoints from the navigation database.
The selected fix is displayed on the EFIS map and highlighted by a green circle.
Distance Entry (DIS)
Enter a distance from the fix. Distances from the fix are displayed on the EFIS
map as a dashed green circle around the fix.
When the distance intersects the active route, the ETA, DTG, and predicted
altitude at the intersection are displayed for that intersection.
If there is more than one intersection, the data will apply to the first occurrence
and will sequence as each intersection is passed.
Valid entries are xxx.x:
.
distance only entries must start with a /
.
leading zeros can be omitted for distance
.
decimal values can be omitted. ETA – displays the estimated time of arrival to the intersection point. DTG – displays the distance to go to the intersection point. ALT – displays the predicted altitude at the intersection point.
Flight Management, Navigation -FMC Cruise 737 Operations Manual
Radial Entry (RAD)
Enter a radial from the fix. Radials are displayed on the EFIS map as green dashed
lines from the fix.
When the radial intersects the active route, the ETA, DTG, and predicted altitude
at the intersection are displayed.
If there is more than one intersection, the data will apply to the first occurrence
and will sequence as each intersection is passed.
Valid entries are xxx.
Radial/Distance Entry (RAD/DIS)
Enter a radial, distance, or both radial and distance from the fix. A radial and distance from the fix is displayed on the EFIS map by both radial and distance, but ETA and ALT fields will be blank.
ABEAM
Displays the abeam point and calculates the ETA, DTG, and ALT information.
The fix abeam point ahead of the airplane is displayed by a radial line from the waypoint ending at the nearest perpendicular route leg intersection. If there is more than one intersection, the data will apply to the first occurrence
and will sequence as each intersection is passed.
Route Intersection Point Copied
Pushing the line select key for one of the RAD/DIS entries copies the fix place/bearing/distance definition into the scratchpad. This fix can be placed into the route on a LEGS page as a waypoint.
Radial/Distance From Fix (RAD/DIS FR)
Displays the radial and distance from the fix to the airplane. This information is continually updated as the airplane position changes.
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