BRT DIM 29.92" 5100 FT Range View Aux GPS2 Bearing VLOC1 Nav GPS 1 Baro Set 29.92" VSI Bug 500 FPM Alt Bug 5020 FT Hdg Bug 300° Hdg Sync Range View OAT TAS GS 7°C 157 KTS 140 KTS SAV DTK 020° 61.3 NM 00:26:18 VOR 113.10 BRG 323° 5200 5100 4900 50 40 20 00 160 150 140 130 14 4 3 2 20 10 10 20 20 10 10 20 ILS ILS 20 10 5 0 -20 -10 -5 270 ° Tape displays are used to  depict airspeed and altitude. An analog gauge is used to  depict vertical speed. Bea a ri rin in n r g VLOC C 1 av v GP PS S S1 S DTK 02  02 0 0° 0 D 61 61. 3 N M 6 0 O 113 10 .10 BRG 32 ° 3° A curvilinear display is used to show rate of turn. Conventional symbology is used to depict heading and navigational information. BR DI 5100 F T A segmented triangle is  used to show turn coordination. Figure 2-1. A typical primary flight display (PFD). 2-2 Common Errors: Altitude Excursions and Fixation Primary Flight Instruments Cross-Checking the Primary Flight Instruments Primary Flight Display (PFD) A PFD presents information about primary flight instruments,  navigation instruments, and the status of the flight in one  integrated display. Some systems include powerplant  information and other systems information in the same  display. A typical primary flight display is shown in  Figure 2-1. The PFD is not intended to change the fundamental way in  which you scan your instruments during attitude instrument  flying. The PFD supports the same familiar control and  performance, or primary and supporting methods you use  with conventional flight instruments. For example, when  using the primary and supporting method to maintain level  flight, the altimeter is still the primary instrument for pitch,  while the attitude indicator is a direct indicator and the  vertical speed indicator provides supporting information.  However, you need to train your eyes to find and interpret  these instruments in their new formats and locations. Flight instrument presentations on a PFD differ from  conventional instrumentation not only in format, but  sometimes in location as well. For example, the attitude  indicator on the PFD in  Figure 2-1  is larger than conventional  round-dial presentations of an artificial horizon. Airspeed and  altitude indications are presented on vertical  tape displays that appear on the left and right sides of the primary flight  display. The vertical speed indicator is depicted using  conventional analog presentation. Turn coordination is  shown using a segmented triangle near the top of the attitude  indicator. The rate‑of‑turn indicator appears as a curved line  display at the top of the heading/navigation instrument in the  lower half of the PFD. Pilots experienced in the use of conventional flight  instruments tend to deviate from assigned altitudes during  their initial experience with the PFD, while they adjust to the  tape display presentation of altitude information. Another  common error is the tendency to fixate and correct deviations  as small as one to two feet at the expense of significant  deviations on other parameters.