Garmin GPS 400W Reference Guide - Page 180

9 - AUX PAGES Setup 1 more than 500 feet above or below an airspace, you will not be notified with an alert message; if you are less than 500 feet above or below an airspace and projected to enter it, you will be notified with an alert message. The default is 200 feet. CDI / Alarms- allows you to define the scale for the 400W-series unit on-screen course deviation indicator. The scale values represent full scale deflection for the CDI to either side. The default setting is "Auto". At this setting, the CDI scale is set to 2.0 NM during the "en route" phase of flight. Within 31 NM of your destination airport, the CDI scale gradually ramps down to 1.0 NM (terminal area). Likewise, when leaving your departure airport the CDI scale is set to 1.0 NM and gradually ramps up to 2 NM beyond 30 NM (from the departure airport). During approach operations the CDI scale gradually transitions down to an angular CDI scale. At 2.0 NM of the final approach fix (FAF), CDI scaling is tightened from 1.0 to the angular full scale deflection (typically the angular full-scale deflection is 2.0°, but will be as defined for the approach). If a lower CDI scale setting is selected (i.e., 1.0 or 0.3 NM), the higher scale settings are not selected during ANY phase of flight. For example, if 1.0 NM is selected, the 400W-series unit uses this for en route and terminal phases and ramps down further during an approach. Note that the Horizontal Alarm (HAL) protection limits listed below follow the selected CDI scale, unless corresponding flight phases call for lower HAL. For example, if the 1.0 NM CDI setting is selected, full-scale deflection during approach will still follow the approach CDI scale settings. CDI Scale Auto (oceanic) ±2.0 NM or Auto (en route) ±1.0 NM or Auto (terminal) ±0.3 NM or Auto (approach) Horizontal Alarm Limit 2.0 NM 2.0 NM 1.0 NM 0.3 NM An "auto" ILS CDI selection allows the 400W-series unit to automatically switch the external CDI from the GPS receiver to the VLOC receiver, when intercepting the final approach course. Or, select "manual" to manually switch the external CDI connection, as needed (using the CDI key). If the unit is installed with a KAP140/KFC225 autopilot, automatic switching will not take place. See AUX Setup 1 for ILS CDI Selection details. CDI scales and corresponding Flight Phases: Oceanic En Route Terminal Approach 170 190-00356-00 Rev G