Garmin GNC 420W Pilots Guide - Page 168
Setup 1 Selecting a menu option from the Setup 1, right
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SECTION 9 AUX PAGES 9.4 Setup 1 Page The Setup 1 Page provides access (via menu options) to airspace alarms, CDI scale adjustment, an arrival alarm, units of measure settings, position formats, map datums, and settings for local or UTC time display. When a menu option is selected, the corresponding page appears providing access to the various unit settings. Selecting a menu option from the Setup 1 Page: 1) Press the small right knob momentarily, to activate the flashing cursor (Figure 9-51). Menu Options (to Select, Highlight with Cursor and Press the ENT Key) Current Page Group Number of Pages in Current Page Group Figure 9-51 Setup 1 Page Position of Current Page within Current Page Group 2) Turn the large right knob to select the desired menu option (Figure 9-52), and press the ENT Key (Figure 9-53). Figure 9-52 'Units/Mag Var' Highlighted Figure 9-53 Units/Mag Var Page The following menu options are available: • 'Airspace Alarms' - Allows the pilot to turn the controlled/special-use airspace message alerts on or off. This does not affect the alerts listed on the Nearest Airspace Page or the airspace boundaries depicted on the Map Page. It simply turns on/off the warning provided when approaching or near an airspace. An altitude buffer is also provided which 'expands' the vertical range above or below an airspace. For example, if the buffer is set at 500 feet, and the aircraft is more than 500 feet above or below an airspace, the pilot is not notified with an alert message; if the aircraft is less than 500 feet above or below an airspace and projected to enter it, the pilot is notified with an alert message. The default is 200 feet. • 'CDI/Alarms' - Allows the pilot to define the scale for the GNC 420's on-screen course deviation indicator. The scale values represent full scale deflection for the CDI to either side (Figure 9-54). The default setting is 'Auto'. At this setting, the CDI scale is set to 5 nm during the enroute/oceanic phase of flight. Within 30 nm of the destination airport the CDI scale gradually ramps down to 1.0 nm (terminal area). Likewise when leaving the departure airport the CDI scale is set to 1.0 nm and gradually ramps UP to 5 nm beyond 30 nm (from the departure airport). 9-20 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
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