GPS guided bombs use a line from the plane to the ground where the ground is calculated based on the topographical maps.
This does not take into account any buildings in the path to the target ground
This does not take into account the location of a target vehicle above the ground
Hint: Target the wheels or where the ground is under the target you are interested in
ARM Targeting pod
Left panel next to laser arm
Enable Targeting pod
Select A - G on Targeting Pod MFD
Set Targeting Pod MFD to SOI
Coolie Right (Long)
Slave Targeting pod to Steer Point
Assumes target is around steer point
China Hat Forward (Long)
Select desired target
Use slew to move around
Use zoom [DMS Up/Down (Long)]
Select with China Hat Forward (Short)
Set SPI to target
TMS Up (Long)
Use master mode to switch to NAV, CCIP or CCRP
Cannot be in "Guns" mode
Select Bomb via DMS Left / Right via HUD
Steering point line should show up if you are in CCRP mode.
As long as you are targeted you should see
Diamond with line indicating what is targeted and direction to target
Solid steering point line
CCRP targeting circle and line
Line up both lines as best you can
Circle with number will drop
Hold weapon release prior to small circle entering CCRP circle
Keep weapon release held until after small circle has left CCRP circle
Normal (GPS) mode will have the bomb go to the ground where the target has been set. When using this mode it is important to target the wheelbase of the vehicle being targeted as the system will be using GPS to target the unit.
Alternatively, Point (Laser) mode can be used to track and hold to a target and in this mode you only need to paint the target.
Mode: CCRP
CHG SET:
AUTO LS: ON
Sets the system to automatically deploy the laser based on time to ground impact
LS TIME: 15
Sets Laser to engage 15 seconds prior to impact with target
If the bomb engages sooner than that, there is a risk it could use up all its energy prior to reaching the target and miss
YouTube: GBU-12
YouTube: GBU-12: DSMS Settings
YouTube: How the GBU-12 Works
YouTube: Continuing with the GBU-12