Ryan TCAD 9900 - Section 4: Threat Acquisition; Bearing to Traffic (Model 9900 B); Visual and Non-Visual Acquisition

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SECTION IV

THREAT ACQUISITION

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The following paragraphs describe the threat acquisition

portion of TCAD operation, and include information on

visually acquiring traffic, and situations that will be

encountered in TCAD operation.

BEARING TO THE TRAFFIC (Model 9900B)

The TCAD Model 9900B uses a patented antenna system

and four receivers to provide bearing to the traffic. An

arrow on the display shows the direction to aid in visually

locating the traffic.

The direction of the traffic is determined using the top and

bottom antennas. Each antenna provides basic directional

information, and a minimum level signal from the opposing

antenna resolves any ambiguity.

TCAD presents traffic information in a plan-view format on

Multifunction Displays. For more information, see the

Supplement at the end of this manual. Contact Ryan

International Corporation for a current list of compatible

displays.

NOTE: TCAD diagnostics monitor for bearing reliability.

When the 9900B detects a low-reliability bearing signal, the

bearing arrow will momentarily disappear. All other

information will continue to be displayed.

VISUAL AND NON-VISUAL ACQUISITION

(Model 9900 and 9900A)

When TCAD detects traffic, and the alert sounds, the pilot

should view the TCAD display and determine the vertical