3,500'  3,500' 7 NMI  using TIS .  Figure 11-17. The area su rrounding the aircraft for coverage  using TIS. Figure 11-18. A typical display on aircraft MFD when using TIS.  MODE  MAP WPT AUX NRST VOLTS 28.1  SATZ AMPS 0  RUDDERTRIM L R  ELECTRICAL 5 476  $_{1}$1497 212  61.9 10.0 2420 27.4 NAV1108.0 0 113.00 NAV2108.0 110.60 134.000 118.000 COM1 123.800 118.000 COM2 $_{WPT }$______$_{ DIS }$__._ $_{NM DTK }$___$_{° TRK 360°}$ ALERTS  MAP-TRAFFICMAP TRAFFICMODE OPERATE FLAPS ELEV TRIM UP D N TAOFFSCALE HDG UP  12NM 6NM + 05  - 03  pilot. Systems such as TIS provide a visual representation  of nearby traffic and displays a symbol on the moving map  display with relative information about altitude, vertical  trends, and direction of flight.  [Figure 11-18] It is important to remember that most systems display only a  specific maximum number of targets allowed. Therefore, it  does not mean that the targets displayed are the only aircraft  in the vicinity. The system displays only the closest aircraft.  In addition, the system does not display aircraft that are not  equipped with transponders. The display may not show any  aircraft; however, a Piper Cub with no transponder could be  flying in the area. TIS coverage can be sporadic and is not  available in some areas of the United States. Traffic advisory  software is to be utilized only for increased situational  awareness and not the sole means of traffic avoidance. There is  no substitute for a good visual scan of the surrounding sky. 11-14