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Flight Instruments, Displays -Electronic Flight Instrument System 737 Operations Manual
Radar
Symbol Name Applicable Mode(s) Remarks
VAR/MAP+12 Weather radar Annunciations (G) MAP CTR MAP PLAN EXP NAV FULL NAV These symbols are displayed only when the weather radar switch on the EFIS control panel is selected on. (refer to Chapter 11, Flight Management, Navigation). GAIN – VAR indicates that gain control is not in CAL (calibrated) detent. MODE: . MAP – weather radar is operating in map mode . WX – weather radar is operating in weather mode . WX+T – weather radar is operating in weather mode with turbulence detection enabled . TEST – weather radar is in test mode, and test pattern is displayed TILT – indicates antenna tilt angle.
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Flight Instruments, Displays -Electronic Flight Instrument System
737 Operations Manual
TCAS
Symbol Name Applicable Mode(s) Remarks
-03 TCAS resolution advisory (RA), relative altitude (R) MAP CTR MAP EXP NAV EXP VOR/ ILS These symbols are displayed only when the EFIS control panel traffic (TFC) switch is selected on. Refer to Chapter 15, Warning Systems. The arrow indicates traffic climbing or descending at a rate greater than or equal to 500 fpm. At rates less than 500 fpm, the arrow is not displayed. For relative altitude symbols, the number and related signs indicate altitude of traffic in hundreds of feet relative to the airplane. For absolute altitude symbols, the number indicates altitude of traffic in thousands and hundreds of feet. For both relative and absolute altitude, the number is below the traffic symbol when the traffic is below, and above the traffic symbol when the traffic is above the airplane. Absence of the number implies altitude unknown.
+02 TCAS traffic advisory (TA), relative altitude (A)
-05 TCAS proximate traffic, relative altitude (W)
+09 TCAS other traffic, relative altitude (W)
12 8 TCAS TA, absolute altitude
RA 5.3 +03 TCAS no bearing MAP Message provides traffic
message (RA–R, CTR MAP type, range in NM, altitude
TA 8.9 -12 TA–A) EXP NAV and vertical direction.
EXP VOR/
ILS
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Flight Instruments, Displays -Electronic Flight Instrument System 737 Operations Manual
Symbol Name Applicable Mode(s) Remarks
TRAFFIC TCAS traffic alert message (RA–R, TA–A) All Displayed whenever a TCAS RA or TA is active. EFIS control panel TFC switch does not have to be selected on.
OFFSCALE TCAS off scale message (RA–R, TA–A) MAP CTR MAP EXP NAV EXP VOR/ ILS Displayed whenever RA or TA traffic is outside the traffic area covered by the selected range. Displayed only if the EFIS control panel TFC switch is selected on.
TFC TCAS mode (B) MAP CTR MAP EXP NAV EXP VOR/ ILS Indicates the TCAS display is active; the EFIS control panel TFC switch is selected on.
TA ONLY TCAS mode (B) All Indicates TCAS computer is not computing RAs. Displayed whether the EFIS control panel TFC switch is selected on or off.
TCAS TEST TCAS mode (B) All Indicates TCAS is operating in the test mode. Displayed whether EFIS control panel TFC switch is selected on or off.
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Flight Instruments, Displays -Electronic Flight Instrument System
737 Operations Manual
Symbol Name Applicable Mode(s) Remarks
TCAS OFF TCAS mode (A) All Displayed when the TCAS/ATC mode switch is not in TA ONLY or TA/RA, whether EFIS control panel TFC switch is selected on or off. Not displayed if TCAS is failed or in test.
TCAS FAIL TCAS mode (A) All Indicates TCAS failure, whether EFIS control panel TFC switch is selected on or off. Once displayed, can be cycled on/off with the TFC switch.
Range Ring (W) As Installed MAP, MAP CTR, APP, VOR Displayed when TFC selected on EFIS Control Panel. Shows 3 NM range ring oriented to aircraft heading. Displayed at ranges of 80 NM or less.
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