TILT Control
Rotate clockwise – radar antenna tilts up to selected degrees from horizon.
Flight Management, Navigation -Controls and Indicators

Rotate counterclockwise – radar antenna tilts down to selected degrees from horizon.

FORWARD ELECTRONIC PANEL

Weather Radar Mode Switches
Push – selects mode. Left mode switches control the Captain’s radar display, right mode switches control the First Officer’s radar display.
.
TFR (transfer) – transfers other map display selections to related map

.  
WX/T (turbulence) – shows weather radar returns and turbulence.
Turbulence display is available on the EHSI if the selected map range is
50 nautical miles or less

Note:  Turbulence detection requires presence of detectable precipitation. Clear air turbulence cannot be detected by radar.

.
WX – shows weather radar returns at selected gain level

.
MAP – shows ground returns at selected gain level

.
IDNT – suppresses ground return in WX and WX/T modes

Note:  Continuous operation is not recommended because weather return intensity may be reduced.

.  
TEST – shows test pattern on map display with WXR selected (except in
PLAN mode) and tests transmitter (transmits only up to one second).

Gain Uncalibrated (GAIN UCAL) Lights
Illuminated – related gain control is in an uncalibrated position.

TILT Control
Rotate clockwise – radar antenna tilts up to selected degrees from horizon.
Rotate counterclockwise – radar antenna tilts down to selected degrees from horizon.
Copyright . The Boeing Company. See title page for details.
11.10.30   June 7, 2002

Flight Management, Navigation -Controls and Indicators 737 Operations Manual

GAIN Control
Rotate – sets gain in WX, WX/T and MAP modes.

Mode Selector Switch
TEST – displays maintenance test pattern.
WX – activates display of detected precipitation.
WX/TURB – activates display of detected turbulence (within 40 nm) along with

display of detected precipitation. Note: Turbulence detection requires presence of detectable precipitation. Clear air turbulence cannot be detected by radar. MAP – activates display of detected ground returns.

GAIN Control
Rotate – manually sets receiver sensitivity to enhance ground mapping in MAP mode only.
System automatically sets gain in other modes.

TILT Control
Rotate clockwise – radar antenna tilts up to selected degrees above horizon.
Rotate counterclockwise – radar antenna tilts down to selected degrees below horizon.
Flight Management, Navigation -Controls and Indicators 737 Operations Manual

As installed
FORWARD ELECTRONIC PANEL

Antenna Tilt Control
Rotate clockwise – radar antenna tilts up to selected degrees above horizon. Rotate counterclockwise – radar antenna tilts down to selected degrees below horizon.

Mode Switch
WX/TURB – activates display of detected turbulence (within 40 nm) along with display of detected precipitation. Note: Turbulence detection requires presence of detectable precipitation. Clear air turbulence cannot be detected by radar. WX – activates display of detected precipitation. MAP – activates display of detected ground returns.

GAIN Control
IN–AUTO – presets an optimum receiver sensitivity for best weather radar
display.
OUT–VAR – manually sets receiver gain.

Radar System (SYS) Switch
Selects transmitter/receiver system for operation when radar is on.

Mode Selector
TEST – displays maintenance test pattern.
WX – displays selected radar mode switch returns.

Copyright . The Boeing Company. See title page for details.
11.10.32  December 1, 2000

Flight Management, Navigation -Controls and Indicators 737 Operations Manual

Radar Control (CONTROLS) Switch
L – displays weather radar returns to both pilots based on left weather radar

control settings.
BOTH – allows each pilot to update the respective weather radar displays based
on related control settings.

R – displays weather radar returns to both pilots based on right weather radar
control settings.

Flight Management, Navigation -Controls and Indicators 737 Operations Manual

Intentionally
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Copyright . The Boeing Company. See title page for details.
11.10.34  December 1, 2000

737 Operations Manual

Introduction
Navigation systems include the flight management system (FMS); inertial reference system (IRS); radio navigation systems (ADF, DME, ILS, marker beacons, and VOR); transponder; and weather radar.
　
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