Garmin GPS III Owner's Manual

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

With the profile set, the HSI Page will guide you through the maneuver. Data fieldson the HSI Page can be configured to indicate the time to beginning of maneuver, glideratio and vertical speed to target. A VNAV indicator on the HSI display will guide youalong the proper descent angle. Expect the following to occur when using the verticalnavigation feature:• As you approach the initial descent point, the time to vertical navigation(‘Time to VNV’) field indicates the time to reach the initial descent point.• At one minute prior to the initial descent point, a message ‘ApproachingVNAV Profile’ occurs. The time to vertical navigation (‘Time to VNV’) willsequence from indicating time to initial descent point to indicating time toreach target altitude. Finally, the descent angle will lock to prevent changesin speed from altering the profile.• At 500 feet above the target altitude, an ‘Approaching Target Altitude’ mes-sage is provided. The time to vertical navigation (‘Time to VNV’) figure willgo blank and the VNAV indicator will disappear from the HSI Page.WARNING: GPS accuracy may be degraded by the U.S. Department of Defense-imposed Selective Availability (SA) program. With ‘SA’ on, GPS altitude may be in errorby several hundred feet. Errors of this magnitude may result in fluctuations in theVNAV indicator on the HSI Page. The GPS III Pilot is a VFR navigation tool and shouldnot be used to perform instrument approaches.Within one minute of theinitial descent point, an‘Approaching VNAV Profile’message will appear.Once you are within 500 feetof the target altitude, the‘Approaching Target Altitude’message will appear and theVNAV indicator will beremoved from the HSIdisplay. 45REFERENCEVertical Navigation#!