The GPS 165 features two nav menu pages for a host of valuable planning andcalculating functions. NAV Menu 1 provides access to the following functions:• Trip Planning • Density altitude/true air speed calc.• Fuel Planning • Winds aloft calculations• VNAV Planning • ChecklistTrip Plan is the first function listed on NAV Menu 1 and allows you to viewinformation regarding distance, ESA, bearing and estimated time enroute between anytwo waypoints and programmed route legs. The ground speed can also be variedmanually to calculate several possible ETEs.To use the trip planning function:1. Press N and rotate O to display NAV Menu 1.2. Press C, then E to access trip planning.3. Rotate K to select waypoint mode or the desired route number and press E.4. For direct-to navigation, use K and O enter the ‘to’ and ‘from’ waypoints. Press Eto accept the waypoints (to use your present position as a waypoint, leave thecorresponding waypoint field blank).5. For route calculations, choose either ‘cum’ for cumulative data (from beginning to end) orthe leg desired by rotating KK.6. Use K and O to enter the ground speed. Press E to calculate the values.7. Press C to complete.The trip direction, distance, ESA and ETE will be displayed on the bottom two linesof the planning page.13NAV KEYNAV Menu 1/Trip PlanningUsing the trip planning function.NAV Menu 1.