Burst-fire torpedo launcher
The burst-fire tube allows more than one torpedo to be launched simultaneously.
Type 2 : Designed for larger vessels, including refitted Ambassador class vessels, the Type 2 burst-fire torpedo tube can fire up to eight photons every five seconds, giving a greater overall rate of fire.
Type 4 : The Type 4 is the most powerful photon torpedo tube currently in service with the Federation. It can fire a burst of twelve torpedoes every five seconds and currently is only fitted to the Sovereign class explorer.