4-11190-01150-02 Rev. J Garmin G500H Pilot’s GuideForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8Glossary Appendix AAppendix BIndex4.5 Garmin Terrain-HSVT™ (Optional)Garmin Terrain-HSVT™ refers to a subset of H-TAWS that meets the terrainalerting requirements outlined in Section 7.b of AC 23-26. Terrain-HSVT isa subset of H-TAWS that provides a FLTA functionality with visual alertingand aural alerting. Terrain-HSVT is provided with Garmin Synthetic VisionTechnology (SVT™) functionality and not provided separately.Terrain-HSVT alerting consists of the following alert types:• Forward Looking Terrain Avoidance (FLTA) Alerting which consists of:• Required Terrain Clearance (RTC) / Required Obstacle Clearance (ROC)Alerting• Imminent Terrain Impact (ITI) / Imminent Obstacle Impact (IOI)AlertingTerrain-HSVT is available in G500H GDU 620 SW version 4.00, and later.Terrain-HSVT utilizes terrain and obstacle databases that are referenced tomean sea level (MSL). Using the GPS position and GPS-MSL altitude, Terrain-HSVT displays a 2-D picture of the surrounding terrain and obstacles relative tothe position and altitude of the aircraft. The GPS position and GPS-MSL altitudeare used to calculate and “predict” the aircraft’s flight path in relation to thesurrounding terrain and obstacles. In this manner, Terrain-HSVT can provideadvanced alerts of predicted dangerous terrain conditions. Detailed alert modesare described later in this section.To function properly Terrain-HSVT requires the use of databases specific tohelicopters and Terrain-HSVT. The databases required are:1) 6 arc-second Terrain Databases2) Helicopter Obstacle Database3) Aviation Database including Heliports
