HEAT missile: Stands for High Explosive Anti Tank. Can be used in Weapons such as an AT-4 Viper Antitank weapon, or can actually be used in a tank.
Often reffered to as just HE (High explosive)
THese rounds are designed to efficently disable the tank and peirce heavily armored vehicles
Commander: "Heavy Troop Crawlers spotted over the bridge. Load HEAT Rounds!"
Loader: "Roger! HE round coming up!"