Boeing 787-8 - Vor; Transponder; Alerting and Transponder Control Panel (ATP)

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
Navigation Systems Description
Copyright © The Boeing Company. See title page for details.
11.20.14 D615Z003-TBC
VOR
Two VOR receivers are usually tuned by the FMC but, can be tuned manually by
the crew. The tuned VORs display on the ND and may be used for position
updates.
VOR Tuning
The crew manually tunes VORs on the NAV RADIO page.
The FMC can tune a VOR and a collocated DME for position updates. The FMC
uses VOR/DME radio position updates when more accurate sources are not
available. Specific VOR/DME pairs can be inhibited on the REF NAV DATA
page. If the crew enters two VOR identifiers on the NAV RADIO page, then the
FMC cannot tune any other station for VOR/DME updates.
VOR Displays
The NAV RADIO page displays FMC tuned or manually tuned VOR data. POS
REF page 2/4 displays the identifier of the VOR and DME pair used for position
updates.
The ND displays the identifier or frequency of the VORs tuned on the NAV
RADIO page. The FMC usually tunes the same VOR in the left and the right. The
ND VOR L and VOR R data are usually the same.
Left and right VOR bearing pointers display on the ND map compass rose when
the related VOR checkbox on the ND drop-down menu is selected. The tuned
frequency or identifier, and associated DME distances are also displayed in the
lower corners of the ND when the VORs are selected on the ND drop-down menu.
Transponder
Two ATC transponders and the traffic alert and collision avoidance system
(TCAS) are controlled from the ATP and the TCP.
Alerting and Transponder Control Panel (ATP)
The ATP controls the following Transponder/TCAS modes:
•STBY
•ALT RPTG OFF
•XPDR
•TA ONLY
•TA/RA
Traffic displays if the transponder mode selector is in TA ONLY or TA/RA. The
transponder responds to Mode S interrogations in all modes except STBY. In
flight, the selected transponder activates beacon and altitude reporting when the
transponder mode selector is in XPDR, TA ONLY, or TA/RA.
August 14, 2009