PART V - ARMAMENT EQUIPMENT

                       target by means of the largest selector button (73) on the
                       control column.  Holding the button in for several
                       seconds causes the radar to reject that target upon which
                       it had locked.  The radar can then lock on targets at
                       ranges greater than the rejected target until the maximum
                       radar sweep range is reached.  It then automatically
                       recycles, commencing to sweep from minimum sweep
                       range.
                 (vi)  Radar range sweep control
                       The rheostat switch on the left of the sight can be used
                       to lower radar ranging distance to prevent radar from
                       locking on the earth when the aircraft is at low altitude.
                 (vii) Radar target indicator
                       The radar target indicator light on the sight comes on
                       when radar has locked on the target while tracking
                       during gunnery operations.
                 (viii)Target span adjustment knob
                       Used in connection with the manual ranging system
                       during gunnery operation, the target span-setting knob is
                       used to set the span of the target aircraft.  This is
                       unnecessary when radar ranging is used.
                 (ix)  Graticule dimmer control
                       The brightness of the graticule may be adjusted by the
                       dimmer control below the sight.
                 (x)   Filament selector switch
                       Selection of alternative filaments (primary or secondary)
                       within the lamp that illuminates the sight image is con-
                       trolled by the filament selector switch (127) on the
                       armament panel.
                 (xi)  Gyro caging button
                       A caging button (47) is provided on the throttle lever to
                       stabilize the graticule image prior to making an attack.
                 (xii) Gyro mechanical caging lever
                       A mechanical caging lever on the right of the sight is
                       moved left to UNCAGE and right to CAGE.  For firing
                       at ground targets, or in the event of sight failure, the lever
                       may be placed at CAGE and the graticule used as a
                       fixed sight.
                 (xiii)Manual ranging control
                       A twist grip incorporated in the throttle lever (62) pro-
                       vides for manual ranging during gunnery operation when
                       radar ranging is erratic (below 6,000 ft. on overland
                       targets).  Manual ranging can be carried out between
                       approximately 400 yds. and 900 yds.  Clockwise rotation

66