Garmin GPS 165TSO Pilot's Manual

Contents

The GPS 165 will also perform winds aloft calculations to inform you of the direction(true) and speed of the wind. This will also inform you whether you areflying with a headwind or tailwind, and its speed.To calculate winds aloft:1. Press C and use O to highlight ‘Winds?’. Press E.2. Use K and O to enter your present heading in the ‘hdg:’ field. Press E.3. Use K and O to enter your true air speed (TAS) in the ‘tas:’ field. If you havecalculated it using the GPS 165, it will be displayed as the default. Press E.The direction, speed and magnitude of the winds aloft will now be displayed. If the GPS165 is interfaced to a compatible Air/Data Sensor, these values will be calculated automatically.The VNAV function calculates vertical speed requirements to obtain a desired altitudebefore or after a certain distance to a waypoint. This is helpful when you would like todescend to a certain altitude near an airport, or climb to a certain altitude before reaching acertain waypoint or NAVAID.To calculate vertical navigation parameters:1. Press C and use O to highlight ‘Vnav Plan?’. Press E.2. Use K and O to enter the initial (from) altitude (your present GPS altitude will appear as thedefault altitude). Press E.3. Use K and O to enter the desired final (to) altitude. Press E.4. Use K and O to enter the distance from the waypoint. Press E.5. Rotate K to select ‘before ’or ‘after’ the waypoint. Press E.6. Use K and O to enter the waypoint identifier from the active route. If you are on a route, or adirect-to, the active ‘to’ identifier will be displayed as default. Press E.16NAV KEYNAV Menu 1/Winds Aloft/VNAVEntering initial and final altitude.Calculating winds aloft.The recommended VNAV descent will bedisplayed in the ‘at’ field.