Garmin GNC 420W Pilot's Manual Addendum

Also see for GNC 420AW: Maintenance manual Pilot's guide addendum Quick reference guide Pilot's Guide & Reference Pilot's Guide & Reference

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Garmin GNC 420W Pilot's Manual Addendum Manual pdf 18 page image

16SECTION 4: RYAN TCAD INTERFACEAll information in this section pertaining to the dis-play and control of the Ryan 9900B TCAD also appliesto the Ryan 9900BX TCAD except for the following:• TCAS-like symbology is used in the 9900BX asopposed to the 9900B (similar to SKYWATCH).• Altitude modes are available similar to SKYWATCH(normal, look up, look down, unrestricted).• Ranges are manually controlled instead of beingautomatically re-sized to the current shield.• Traffic display range selections are different:- Ryan 9900B—range is slaved to current shieldsize.- Ryan 9900BX—1 NM, 1 and 2 NM, 2 and6 NM, 6 and 12 NM, and 12 and 24 NM.See the Ryan TCAD Pilot’s Handbook for adescription of the traffic symbols.Ryan TCAD DescriptionNOTE: Refer to the Ryan TCAD Pilot’s Guide for adetailed description of the Ryan TCAD System.The Ryan TCAD (Traffic and Collision AlertDevice) is an on-board air traffic display used toidentify potential collision threats. TCAD computesrelative altitude and range of threats from nearbyMode C and Mode S-equipped aircraft. TCAD will notdetect aircraft without operating transponders or thosethat are beyond radar coverage. TCAD, within definedlimits, creates a “shield” of airspace around the aircraft,that detected traffic cannot penetrate without trigger-ing an alert.Operator Controls and Basic DisplaysIf there is no communication between the400W/500W Series unit display and the TCAD unit, amessage will appear, notifying the user. After initial-ization, proceed with operation of the 400W/500WSeries unit in a normal manner. TCAD data can beshown in a “thumbnail” view on the Map Page.The Map Page can display TCAD traffic in anyof the top three fields (or top four fields on a500W Series unit) located on the right-handside of the display.TCAD data also displays on the Traffic Page andMap Pages, if heading data is available. The symbolsfor closing and opening traffic shown on both the MapPage and the Traffic Page are identical to those shownon the Ryan TCAD:Section 4Ryan TCAD Interface