User's Manual Part 1

CAS / Part No. 9000000

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

34-43-20

15 Feb 2003

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(2) Display Symbology

The TCAS modes use color--coded symbols and data tags to map air traffic and

locate threat aircraft on the VSI/TRA display.

Four traffic symbols are used: solid circle, solid square, solid diamond, and hollow

diamond. See Figure 1-- 18 for examples. A different color is assigned to each

symbol type, as listed in Table 1--12.

Table 1--12. TCAS Traffic Symbols

Graphic Symbol Color Display Function

Solid Circle Amber T raffic Advisory (TA)

Solid Square Red Resolution Advisory (RA)

Solid Diamond Blue Proximate Traffic

Hollow Diamond Blue Other T raffic

NOTE: TCAS traffic information displayed on EFIS displays such a s crew alerting

system display, navigation display, electronic horizontal situation display or

multifunction display, is similar to that on combined VSI/TRA indicators. Traffic

symbology is identical to that displayed on the VSI/TRA.

(a) Colors

Amber

Represents a moderate threat to a TCAS -- equipped aircraft. A visual search

is recommended to prepare for intruder avoidance. Amber is used only in

conjunction with a traffic advisory.

Red

Represents an immediate threat to a TCAS--equipped aircraft. Prompt

action is required to avoid the intruder. This color is only used in conjunction

with a resolution advisory.

Blue

Represents proximate traffic and other traffic the TCAS surveillance logic

has in its track file.

White

Used only for mode annunciations and for reference graphics, including

aircraft home position, range ring, and VSI scale.

(b) Traffic Identification

Traffic Advisory