Rocket launchers cover a wide variety of man-portable missile launchers of varying degrees of sophistication. The weapons are usually equipped with basic tracking sensors, but are of limited accuracy against human-sized targets. Rocket launchers take a -4 hit penalty against targets of human size or smaller. Unlike most Heavy weapons, rocket launchers can be shoulder-fired without a prepared emplacement to support them.
Rocket launchers use missiles as given on the gear tables.
When firing at TL4 military vehicles such as gravtanks, mechs, or starship armor, most TL3 Heavy weapons don’t count as Heavy for armor-penetrating purposes. Demo charges and explosives do, however.