This is in the most recent copy of the Outland Gazetteer on page 66:

Rockets & Torpedoes
A rocket pod must be manually reloaded outside of combat. On some vessels, the pod retracts into the ship while others require external access to affect the reload. A torpedo launcher has a magazine with a maximum capacity, including the torpedo in the launcher, equal to the vehicle’s Structure. Extra ordinance can be stored in a vessel’s hold; eighteen rockets or twelve torpedoes comprise one unit of cargo.