Weapons
T-45C Weapons System
HUD AIR-TO-GROUND SYMBOLOGY
The velocity vector is always displayed, providing the GINA is on-line. The velocity vector indicates
where the aircraft is actually going, as opposed to where the nose is pointed (waterline). That
information proves very
helpful during weapons
delivery. In A/G modes, the
HUD does not display bank
angle.
When wings-level, the
T-45C waterline (pitch
attitude) can be approxi-
mated by the point of
1
intersection of an imaginary
line tangent to the tops of
the KIAS and BARO altitude
boxes with the centerline of
the Pitch Ladder (see
2
Figure 16). Interpolation is
less accurate as the aircraft
3
banks and the pitch ladder
displaces with the velocity
4
vector.
An “X” overwriting BOMB
or CCIP indicates that the
Master Armament switch on
the Armament Control
Panel is in the SAFE
position. The “X” is
removed when ARM is
selected.
A breakaway cross appears
on the HUD when you must
initiate an immediate dive
1. MILS DEPRESSION
recovery. The cross remains
2. RELEASE INDICATOR
until the aircraft begins to
3. WEAPON MODE INDICATOR
climb. The cross is dis-
4. DSL AIMING RETICLE
played when the system
determines that a normal 4G
Figure 16: HUD A/G DSL DISPLAY (TYPICAL)
recovery, plus normal
reaction time, will result in
the aircraft bottoming out with 1,000 feet AGL. This warning feature is disabled for dive angles of less
than 15 degrees.
MANUAL (MAN) MODE
MAN incorporates a Depressed Sight Line (DSL) aiming reticle, for which mil depression angles set using
the SET DEP rocker switch on the DEP (Figure 5). DSL defaults to 12 mils for gun, 30 mils for rockets,
and 140 mils for bombs. Specific mil numbers are stored for each type weapon. The reticle indicates
where the selected weapon will strike, given the weapon ballistic characteristics, aircraft airspeed,
altitude, angle-of-attack, and direction of flight at the required release parameters. The reticle inner
ring is 25 mils, and outer ring is 50 mils. Outside the rings are two (2) additional mil marks along the
(4-03) Original
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