Since the volume of information now available in the cockpit  cannot be presented on a single display, or would clutter  a single display to the point of unintelligibility, you must  decide what information is needed at any given point in your  flight. You will learn how information systems can be used to  enhance situational awareness and increase the safety margin.  It is important to avoid the pitfalls of using enhanced weather,  traffic, and terrain information to fly closer to hazardous  situations. This negates any safety advantage created by  advanced avionics. Advanced avionics aircraft crash due to  the same causes as aircraft with traditional instrumentation. The moving map function uses the MFD to provide a  pictorial view of the present position of the aircraft, the  route programmed into the FMS, the surrounding airspace,  and geographical features. Moving maps offer a number  of options that allow you to specify what information is  presented on the MFD and how it is displayed. Moving maps  typically offer several different map orientations (e.g., north  up, track up), a range control that allows you to “zoom” in  and out to see different volumes of airspace, and a means to  adjust the amount of detail shown on the display (declutter).  The moving map display does not replace looking outside the  aircraft to avoid other aircraft and obstructions. A multi‑function display (MFD) presents information  drawn from a variety of aircraft information systems.  Many installations allow overlay or inclusion of systems  indications in the primary flight display (PFD), in addition to  the primary flight instrument indications. By allowing you to  view information provided by any one or combination of the  installed systems, the MFD prevents the need for a separate  display for each system. As does the flight management  system (FMS)/area navigation (RNAV) unit, the MFD allows  you to select different pages from different chapters that  display information provided by various aircraft systems.  Other controls allow you to combine information from  multiple systems on one page. In many installations, the MFD  serves as the backup or faildown display for the PFD. You  should have a working knowledge of the faildown selection  procedures and how to select the necessary data displays for  the current flight phase. The controls provided by one MFD  are shown in  Figure 5-1. A moving map display has a variety of uses that can aid your  awareness of position and surroundings during almost any  phase of flight. Verification of the displayed data with a chart  accomplishes three functions: Invest the time required to become a skilled user of the  MFD. Familiarity with the capabilities of the MFD not only  increases the information available, but also allows quick  access to that information for safe flight decision-making. OAT 7°C O OA A AT T 7° C TOPO TERRAIN STRMSCP NEXRAD XM LTNG BACK MAP NRST WPT AUX Pages are selected using these knobs. You can overlay information provided by different cockpit information systems  on a single page using the keys that appear along the bottom of the display. Some MFD pages have subpages. This page annunciator shows that the first subpage of the MAP page is currently selected. Figure 5-1. Selecting pages on an MFD. 5-2 Essential Skills Multi-Function Display Moving Maps Using the Moving Map 1. Program the multi‑function display to show data  provided by any aircraft system. 2. Determine how many data displays can be combined  in one display. 3. Know how to select the PFD displays on the MFD, if  available. 4. Determine which data displays can be overlaid onto  the PFD as well as the MFD. 1. Provides you practice for retention of your map  reading skills. 2. Contributes to your readiness for continued safe  navigation to a destination in the event of equipment  problems. 3. Ensures that you maintain situational awareness.