Observe the NAV DATA prompt displayed. To access the SUPP NAV DATA page, key SUPP into the scratch pad.
NAV DATA page............................................................................ Select
Copyright . The Boeing Company. See title page for details.
SP.11.10 December 3, 2004
Supplementary Procedures -Flight Management, Navigation 737 Operations Manual
Enter the identifier on either the WPT IDENT, NAVAID IDENT, or
AIRPORT IDENT line, as appropriate.
DATA ............................................................................................. Delete
Press the DEL Key and then line select the identifier. Observe the
EXEC Key illuminate.
EXEC Key ........................................................................................Push Data previously entered is deleted. Observe NAV DATA page displayed with prompts.
Entering a Crossing Radial (Bearing) or Distance from a Fix as a Route Waypoint
Distance from a fix as a route waypoint
FIX INFO page...............................................................................Select
Enter the identifier of the reference waypoint (normally an off–route waypoint) onto the FIX line. Enter the desired radial or distance from the FIX on a RAD/DIS line, or line select the ABM prompt if the desired radial or distance from the FIX is perpendicular to the present route/course.
Line select the desired intersection (lines 2L–5L) into the scratch pad and observe the new created waypoint displayed as FIX/Radial/Distance.
RTE LEGS page .............................................................................Select
Line select the new created waypoint, displayed in the scratch pad, to the desired waypoint sequence.
Repeat the above steps to define additional created waypoints as
desired. Correct any ROUTE DISCONTINUITIES.
EXEC key.........................................................................................Push Observe the MOD RTE LEGS page changes to ACT.
Note: These created waypoints are stored in the temporary navigation data base for one flight only.
Inhibiting VOR Use for Position Updating
Note: This procedure inhibits the use of VOR bearing information for FMC position updating. Use the DEL key to remove a VOR from inhibit status.
Supplementary Procedures -Flight Management, Navigation
737 Operations Manual
INIT/REF key .................................................................................. Push Observe the INDEX prompt displayed.
INIT/REF INDEX page ................................................................. Select Observe the NAV DATA prompt displayed.
REF NAV DATA page ................................................................... Select Observe dash prompts for VOR INHIBIT. Enter the desired VOR identifier (a previous entry may be overwritten but will no longer be inhibited).
Inhibiting DME Use for Position Updating
Note: This procedure inhibits the use of DME information for FMC
position updating. Use the DEL key to remove a DME from
inhibit status.
INIT/REF key .................................................................................. Push Observe the INDEX prompt displayed.
INIT/REF INDEX page ................................................................. Select Observe the NAV DATA prompt displayed.
REF NAV DATA page ................................................................... Select Observe dash prompts for DME INHIBIT. Enter the desired DME identifier (a previous entry may be overwritten but will no longer be inhibited).
FMC Navigation Check
If the IRS NAV ONLY, VERIFY POSITION or UNABLE REQUIRED NAV PERFORMANCE – RNP message is displayed in the CDU scratch pad, or course deviation is suspected, accomplish the following as necessary to ensure navigation accuracy:
On airplanes without scanning DME, ensure that one VOR is operating in the AUTO tuning mode so that the FMC can update its position if navaids are available. Check the (prior to U7) PROGRESS page or (U7) NAV STATUS page to ensure that radio updating is occurring. In some cases, it may be necessary to switch both VOR's to the AUTO mode to achieve radio updating.
Determine the actual airplane position using raw data from the VHF navigation or ADF radios and compare that position with the FMC position. (Use the FIX page.)
Copyright . The Boeing Company. See title page for details.
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