-either the active waypoint - or any other selected waypoint of the flight plan. The scale of the map is the one chosen by means of the scale selector switch (the range value selected corresponding to the diameter of the outer circle). The GS, TAS and wind data, and the active waypoint data are displayed like in the other modes; but no navigation station characteristics and associated bearing pointers are available in this mode. The A/C position on the map is represented by a track-orientated yellow A/C symbol.
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ND in ARC Mode - Typical En Route Flight Plan
Figure 021
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ND in ARC Mode - AP/FD in TRACK Mode - A/C off the Flight Plan
Figure 022
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ND in ARC Mode - Takeoff Example
Figure 023
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ND in ARC Mode - VOR/FMGC Discrepancy Message
Figure 024
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ND in Plan Mode Figure 025
1EFF : 1 1 1CES 106-149, 303-399, 1 111 Page 5131-60-00 Config-3 Aug 01/05
(c) Weather radar information (Ref. Fig. 026) Weather radar information is available in any ND Mode except the PLAN Mode. For a given range selected value, the image scale is the same in the ROSE and ARC modes, since the ROSE diameter is exactly equal to the arc radius in the ARC mode: the weather radar indications in the ROSE mode are identical to those in the ARC mode, but shifted upwards. The same applies to the map data. (Ref. Fig. 027) Consequently, the radius of the heading dial represents half the selected range marker value in the ROSE mode, and the full value in the ARC mode. When the weather radar operates, information related to its proper operation is displayed in the ND R lower corner, above the possible side 2 nav. station characteristics:
-tilt angle
-calibration mode
-failure messages.
Each pilot can remove the weather radar image from his ND if he
sets the associated potentiometer to the minimum.
(d) ND Messages Three kinds of messages may be presented on the ND:
-type of approach selected (green, in the mid upper part of the DU)
-
messages associated with a permanent or temporary map loss: MAP NOT AVAIL, MODE CHANGE, RANGE CHANGE (red, in the center of the DU)
-
messages associated with data display or FMS operation (amber,
in the mid lower part of the DU).
(Ref. Fig. 024)
(e) TCAS Indications (Ref. Fig. 001, 028) When intruders are present, they are presented (in ROSE and ARC modes only and for the 10, 20 and 40 NM selected ranges) according to their relative altitude, position and bearing with respect to the aircraft. They are divided into several categories: Proximate Traffic, Traffic Advisory, Resolution Advisory according to the threat they represent.
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ND - Weather Radar in ARC Mode
Figure 026
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ND - Weather Radar Image in ARC and ROSE Mode
Figure 027
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TCAS Indications Figure 028
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Depending on their classification, they have a specific symbology with associated data tag for altitude indication and vertical trend. the off scale intruders are presented through a specific half symbol displayed at the edge of the mask of the ND selected mode. The characteristics of the intruders without bearing are displayed above the FM messages (at the bottom of the ND image). In addition to intruders, specific messages are displayed depending on the various configurations:
-
TCAS : REDUCE RANGE (amber or red)
(Ref. Fig. 029)
-
TCAS : CHANGE MODE (amber or red)
-TA ONLY (white)
(Ref. Fig. 030) In case of TCAS failure, the message NAV TCAS FAULT generated by the FWC is displayed in the warning section of the upper ECAM DU. In addition to this warning a TCAS flag is displayed on the ND and the PFD.
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