TM 1-1520-238-10 3-64.28 Change 8 3.16.15 Co–Pilot Gunner High Action Display (HAD) The CPG HAD (figure 3-25.25) has been modified to pro- vide an Active Target Number in the Sight Status Field and an ORT STORE prompt in the Weapon Status Field. This information will be displayed unless other Sight Status and Weapon Status messages outprioritize it. M01-0352 T41 STR T71 Figure 3-25.25. CPG HIGH ACTION DISPLAY (HAD) a. Sight Status Field. The Sight Status Field is modi- fied to provide an indication of the Active Target Number. Character spaces 1 thru 3 are blank. Character space 4 will be a T or W indicating the Active Target is in either the Target or Waypoint List. Character space 5 and 6 will be a number from 01–80 indicating the location within the TGT/WPT List. Character spaces 7 and 8 are blank. b. Weapon Status Field. The Weapon Status Field is modified to provide the ORT STORE prompt. The ORT STORE prompt is formatted as follows: STR TXX. XX is a number from 71–80 to designate which location in the TGT List has received the new coordinate data. The ORT STORE prompt will be displayed for a duration of 2 sec- onds and will then be removed. STR will be located in character spaces 1–3. Character space 4 is blank. Char- acter space 5 will be a T. Character spaces 6 and 7 will contain the numbers from 71 to 80. Character space 8 is blank. NOTE During an electrical system malfunction and operating on EMERG BATT power, the HSI/ RMI will not provide adequate indications to the station. 3.16.16 Horizontal Situation Indicator (HSI). The HSI, (fig 3-25.26), on the pilot instrument panel is an electromechanical indicator that presents position infor- mation in relation to various navigational inputs. The HSI interfaces with the (HARS), the (ADF), and the doppler navigation set. The instrument displays consist of a fixed aircraft symbol, a compass card, two bearing-to-station pointers with back-course markers, a course bar, a (KM) indicator, a (HDG) knob and marker, a course set (CRS) knob, a COURSE digital readout, a to-from arrow, a NAV flag, and a compass HDG flag. Operating power for the HSI is taken from the 115 vac No. 1 essential bus through a circuit breaker marked HSI on the pilot center circuit breaker panel. Controls and indicators for the horizontal situation indicator are described in table 3-22.19. KM INDICATOR AND DISTANCE WARNING SHUTTER HDG SELECT MARKER COURSE SET POINTER LUBBER LINE BEARING POINTER 2 COURSE SET COUNTER HDG FLAG BEARING POINTER 1 COURSE SET KNOB COURSE DEVIATION BAR HEADING SET KNOB AIRCRAFT SYMBOL COMPASS CARD NAV FLAG M01-036 Figure 3-25.26. Horizontal Situation Indicator (Typical)