Figure 3-1. Limitations of conventional navigation. information found on en route and terminal procedure charts.  The newer, more capable units provide map displays, traffic  and weather overlays of data, contain VOR/DME/localizer/ glideslope receivers, and can compute fuel usage in addition  to the navigation route information. For this reason, the more  descriptive term “FMS” is used in this handbook to refer to  these GPS receivers. allow the pilot to enter information and program the avionics  to accomplish the desired operations or tasks. The display and  controls for a typical FMS are shown in  Figure 3-2. An FMS allows you to enter a series of waypoints and  instrument procedures that define a flight route. If these  waypoints and procedures are included in the navigation  database, the computer calculates the distances and courses  between all waypoints in the route. During flight, the FMS  provides precise guidance between each pair of waypoints  in the route, along with real‑time information about aircraft  course, groundspeed, distance, estimated time between  waypoints, fuel consumed, and fuel/flight time remaining  (when equipped with fuel sensor(s)). RNG PULL SCAN PUSH ON BRT PROC CRSR MSG OBS ALT NRST CLR ENT D MENU DTK TK . nm LEG VOR NDB INT USR ACT NAV FPL SET AUX APT1 The display allows you to view information stored in the FMS. Controls such as buttons and knobs  allow you to make entries into the FMS. Figure 3-2. FMS display and controls. Accessing Information in the FMS FMS/RNAV/Autopilot Interface: Display and  Controls FMS units contain much more information than they can  present on the display at any one time. Information pertaining  to some topics often extends beyond what can be presented on  a single page. Page groups, or chapters, solve this problem by  collecting all of the pages pertaining to the same topic. Each  Every avionics device has a display and a collection of  buttons, keys, and knobs used to operate the unit. The display  allows the device(s) to present information. The controls  3-3 The pilot must define Point C as the intersection  between two radials, fly to intercept one of them,  then track the radial to Point C.  C A B A 2. The aircraft can intercept the closest airway and  track it to Point B... 1. The aircraft positioned at  Point A wishes to navigate  directly to Point B. 3. ...or attempt to intercept  an extension of the  radial that defines  Point B. 1. The aircraft positioned at  Point A wishes to navigate  directly to Point C.