Garmin GNC 420W Pilots Guide - Page 61

With the profile set, the vertical speed required (VSR) is displayed on the Vertical Navigation Page. Expect the following to occur when using the vertical navigation feature: • At one minute prior to reaching the initial descent point, a message 'Approaching VNAV Profile' occurs. The descent (or climb) angle also locks to prevent changes in speed from altering the profile. • If selected, the vertical speed required (VSR) readout on the Default NAV Page and the Map Page show the desired vertical speed to maintain the proper descent (or climb) angle. • At 500 feet above (or below, for a climb) the target altitude, an 'Approaching Target Altitude' message is provided. The VSR readout on the Default NAV Page and the Map Page is blanked out, at this point. Vertical navigation messages can be turned on or off, they are off by default. Turning the messages off allows the pilot to keep the previous profile settings, without having them generate messages when the feature is not needed. SECTION 3 NAV PAGES Disabling/Enabling the vertical navigation (VNAV) messages: 1) Press the MENU Key to display the Vertical Navigation Page Menu (Figure 3-55). Figure 3-55 VNAV Page Menu 2) With 'VNAV Messages On?' highlighted, press the ENT Key. Or, if the messages are already on, to turn them off, make sure 'VNAV Messages Off?' is highlighted and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-27