Semi-Active Homing Weapons

“Semi-active” laser or radar homing is common on TL7+ missiles.
The seeker head on this type of projectile detects and homes in on the
reflections of a laser or radar beam directed at the target. As for other
homing weapons, the firer does not need to do anything once the
weapon is launched. However, someone (the firer or an ally) must aim
a properly modulated laser or radar beam at the target until the mis-
sile hits.
Modern soldiers often sneak up close to their targets and use rifle-
sized “laser designators” to direct laser-homing “smart bombs” or
missiles launched by distant aircraft or artillery. Designating a target
requires continued Aim maneuvers and a DX-based roll against
Forward Observer skill (p. 196); failure means the weapon misses its
target.