PART I-DESCRIPTIVE

          the coaming on the left of the sight.  Ranging is effected
          by rotating the throttle twist-grip.

     (b)  Altitude and ballistics units automatically compensate for
          the time of flight and gravity drop of the particular
          ammunition in use,  The altitude unit is fully automatic
          but the ballistics unit must be preset before flight.

     (c)  The selector dimmer control (54) contains a dimmer
          switch and a five-position selector switch. The five         
          positions are:-

          G. (gyro)                  Moving. graticule only is
                                      visible.

          F. and G. (fixed and gyro)  Both graticules are visible.
          F. (fixed)                  Fixed graticule only is
                                        visible.
          M.R.P. (Medium R.P.)  )      The sight is set for use with
          S.R.P. (Steep R.P.)	)        R.P's.

     (d)  Emergency manual lowering is effected by striking the
          knob (50) on the left of the sight.
          

     44.  V.H.F.-TR. 1985/1986 with telebriefing-ARI. 18064

     (a)  The two 10-channel V.H.F. controllers. (25) with an
          adjacent changeover switch, (26) are at the bottom of the
          port instrument panel. A press-to-transmit switch is in
          the end of the throttle lever handle. The sets are stowed
          in the starboard equipment bay. The TR. 1985 aerial
          is mounted on top of the fuselage and the TR. 1986
          aerial is below the fuselage.

     (b)  The telebriefing land-line is at the aft end of the fuselage
          port side. When the plug is connected the V.H.F. circuit
          is de-energized and a red warning light (90) on the star-
          board shelf indicates that telebriefing is in use. The
          pilot's press-to-speak switch is adjacent.


     45.  I.F.F. (when filled)

             At a later dale Mk. 10 I.F.F. will be fitted

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