2 - NAV PAGES34NOTE: If the 500W-series unit is unable to determinea GPS position, the present position (airplane) symbolwill appear on the Map Page in yellow. No symbol willbe present when there is no active flight plan.Map SymbolsVarious symbols are used to distinguish betweenwaypoint types. The identifiers for any on-screenwaypoints can also be displayed. (By default the identi-fiers are enabled.) Special-use and controlled airspaceboundaries appear on the map, showing the individualsectors in the case of Class B, Class C, or Class Dairspace. The following symbols are used to depict thevarious airports and navaids on the Map Page:Airport with hard surface runway(s); Primary runway shownAirport with soft surface runway(s) onlyPrivate AirfieldIntersectionVORVORTACVOR/DMETACANDMENDBLocalizerLocator Outer MarkerHeliportMap RangeThe map display can be set to 23 different rangesettings from 500 feet to 2000 nautical miles (statuteand metric units are also available). The range is indi-cated in the lower left-hand corner of the map display,and represents the top-to-bottom distance covered bythe map display.The map range appears in the lower left corner.Use the RNG key to select the desired map range.To select a map range:1. Press the up arrow side of the RNG key tozoom out to a larger map area.2. Press the down arrow side of the RNG keyto zoom in to a smaller map area and moredetail.Map Page Auto ZoomAn autozoom feature is available which auto-matically adjusts from an en route range of 200 NMthrough each lower range, stopping at a range of1.0 NM as you approach your destination waypoint.The autozoom feature is turned on/off from the mapsetup page described later in this section.The Map Page also displays a background mapshowing lakes, rivers, coastlines, highways, railwaysand towns. When a map scale is selected below thelower limit at which the map detail was originallycreated, an “overzoom” indication appears on the mapdisplay, below the scale reading. “Overzoom” indicatesthat the detail at this scale may not accurately repre-sent actual conditions (and extra caution should beobserved when these scales are used for navigation).The “Setup Map?” option allows you to define themaximum scale at which each map feature appears.This provides you with complete control to minimizescreen clutter. You can also quickly remove items fromMap Page
