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VOR (or ILS) tuning :
VOR (or ILS) key............................................................................................................. PRESS
Green light comes on.
Both windows display previously selected frequencies.
Rotating knob..................................................................................................................... TURN
Set the frequency in the STBY/CRS window.
Transfer key..................................................................................................................... PRESS
The ACTIVE window displays the selected frequency.
The STBY/CRS window displays the frequency that had been displayed in the ACTIVE
window.
Rotating knob..................................................................................................................... TURN
Set the course on the STBY/CRS window.
The receiver is now tuned to the frequency of the new station, and the course is selected.
To select another station, press the transfer key (making both windows display the previously
selected frequency) before retuning the VOR (or ILS).
Note: When the radio-nav standby mode is active (NAV key ON) and VHF or HF
tuning is required, select the VHF key or the HF key on the RMP (normal radio
communications use). The NAV key, which has no effect on the selection of a radio
communication frequency, must remain in the ON position in order to prevent radio
navigation aid tuning from changing NAV receiver frequencies.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-SUP-34 P 3/24
FCOM 19 AUG 10
AUTOMATIC IDENTIFICATION OF ADF/VOR/ILS
Applicable to: ALL
Although the navigation display automatically identifies the tuned ADF, VOR, or ILS station (auto
ident decoded), the flight crew must, in the following cases, confirm the correct tuning of the desired
station via the audio system :
A station has either been automatically tuned, or manually tuned ‐ by a crewmember that enters the
associated ident on the MCDU RAD NAV page ; and the decoded ident appearing on the ND is
the wrong one.
A crewmember manually ‐ tunes the station on an RMP, or enters the frequency on the MCDU RAD
NAV page.
WEATHER RADAR
Applicable to: ALL
INTRODUCTION
Airborne weather radar gives the flight crew an efficient tool for detecting bad weather during flight.
The digital weather radar with its multicolor navigation display allows the crew to follow the best
route to avoid weather problems.
To this end, some operational advice, based upon a general knowledge of the radar capabilities, is
given in this chapter.
Applicable to: ALL
GENERAL
The radar is nothing more than a precipitation detector. How much weather it detects depends
upon the raindrops, their size, composition and number.
The radar does not detect :
• clouds, fog or wind (too small droplets or no precipitation at all)
• clear air turbulence (no precipitation)
• windshear (no precipitation except in microburst)
• lightning.
The radar does detect :
• rainfall
• wet hail and wet turbulence
• ice crystals, dry hail and dry snow (above 30 000 ft) will only give small reflections.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-SUP-34 P 4/24
FCOM 19 AUG 10
Applicable to:
OPERATIONAL FUNCTIONS
TILT, RANGE AND GAIN
The three things that the flight crew must understand in order to take full advantage of the
weather radar are :
‐ antenna tilt, which causes the center of the radar beam to scan above or below the attitude
reference plane
‐ range control which, in coordination with tilt governs the range of the navigation display
‐ gain control, which adjusts the sensitivity of the receiver (and should normally be set to
AUTO or CAL ). The sensitivity of the receiver may vary from one type of radar system to
another.
COLOR CODE
A color code distinguishes areas by the intensity of the precipitation in them :
‐ black for the lowest intensity (nothing appears on the ND)
‐ green, amber and red for progressively higher intensities
‐ magenta for saturated areas, in the weather and turbulence mode (WX + T).
GROUND MAPPING – GROUND CLUTTER SUPPRESSION (IF INSTALLED)
Some radars have two additional modes :
‐ Ground mapping mode permits the radar to produce more returns from less reflective targets
on the ground. The associated color code is: black for standing water (no returns), green for
the ground, amber or red for cities and mountains (strong returns).
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 11(98)
