It will be easier once we have the TGP but for example if you have 4 AGM's and you find a line of 4 tanks:
- Master mode A/G and bring maverick display to the DDI
- select a nearby waypoint and press WPDSG (first mav will slave to this WP)
- Sensor control switch up to bring HUD TDC
- Slew POI to the first tank using HUD TDC and looking at the maverick display or HUD (it's a bit tricky because HUD slew is more sensitive)
- the maverick should lock the first tank automatically once it is looking at it. Fire first missile
- second missile comes online, press uncage buton and it will slave to the tanks location
- slew to the next tank and repeat
It is actually a fast way to unload all the missiles in one pass without having to slew each mavericks back to the target area and without undesignating the ground POI.
It is probably not a common USN practice though :)