Garmin GPS III Owner's Manual

Also see for GPS III: Declaration of conformity Quick guide Owner's manual Owner's manual

Airspace SettingsClass B is used to enable/disable alarms for Class B or CTA (ICAO control areas) airspace.Class C allows you to enable/disable alarms for Class C or TMA (ICAO terminal controlareas) airspace.Tower Zone provides an alarm within a 4.3 nm radius from airports with control towerswhich are not associated with Class B or Class C airspace. (Typically referred to as Class D.)Restricted allows you to enable/disable alarms for restricted areas.MOAs lets you enable/disable alarms for military operations areas.Other SUAs provides alarms for other special-use airspace categories including: training,caution, danger, warning and alert areas.Mode C Veils provides an alarm within the outer limit of an airspace (usually Class B orC) where a Mode C altitude-encoding transponder is required.Altitude Buffer expands the vertical range of an airspace, providing an added margin ofsafety. For example, if the buffer is set at 500 feet, and you are more than 500 feet aboveor below an airspace, you will not be notified with an alert message. If you are less than500 feet from the floor/ceiling limits of the airspace, you will be notified with an alertmessage. The default setting for the altitude buffer is 200 feet.To turn an airspace alarm on or off and enter an altitude buffer:1. Highlight the desired airspace category or the ‘Altitude Buffer’ field and press ENTER.2. For airspace alarms, select ‘On’ or ‘Off’ and press ENTER.3. For the altitude buffer, enter the desired buffer distance and press ENTER.NOTE: Alarms for prohibited areas are always on. Disabling any of the above listed airspacecategories only removes the alert. The boundaries will still appear on the map display.You may enable/disable theairspace alerts by the individ-ual categories shown.The altitude buffer providesan added margin of safetybeyond the floor/ceiling limitsof a given airspace.84REFERENCESetup: Airspace#?