Artillery is a skill, described in Basic Set, p. 178-9. It has the specialties Beams, Bombs, Cannon, Catapult, Guided Missile, and Torpedoes. It is referenced in GURPS High-Tech™, p. 139 and GURPS Low-Tech™, pp. 79-80, on use of the skill with artillery weapons.
- On relevance to specialties in a special ops team 
- On it possibly benefiting from Altered Time Rate