TRACKING - Shells fired from this weapon track their target
Rockets are self guided to target once fired
In Destiny, TRACKING is a Weapon Upgrade that can be found on any non basic Rocket Launcher in the game. Weapons in Destiny pull each Upgrade at random from specific pools (with a few Weapons that are an exception).
To see more info on exactly which Weapons this Upgrade can be found upon click the link below:
To see more about how this Weapon Upgrade fits into these pools, please click the links below:
ROCKET LAUNCHER WEAPON UPGRADES