Torpedo Tube (2nd class):

Dating from the late 2200's, this model is now only in service on the Excelsior, Miranda, Centaur, Oberth, and Constellation classes.

This tube is capable of firing one photon torpedo approximately every four seconds.

Standard Torpedo Tube:

A modern version of the 2nd class torpedo tube, this model can fire a torpedo every two seconds. It is more compact than the older model, has lower maintenance requirements, and is less prone to overheating with prolonged use

Burst Fire Type 1:

One of the most important advances in torpedo tube technology, the burst fire tube allows more than one torpedo to be launched simultaneously. The Type 1 model can load and fire a cluster of four photons every 2.85 seconds; although this makes the tube almost three times as bulky as a standard tube, it allows many targets to be engaged simultaneously. The Type 1 is fitted to the Ambassador class as well as various Starbases and space stations

Burst Fire Type 2:

Designed for larger vessels, the type 2 burst fire torpedo tube can fire up to eight photons every five seconds, giving a greater overall rate of fire and increasing the number of targets which can be engaged simultaneously

Burst Fire Type 3:

Developed to arm the Galaxy and Nebula classes, this tube can fire up to ten torpedoes every five seconds - a 25% increase over the type 3 - or alternately can fire single rounds at a high rate of fire

Burst Fire Type 4:

The type 4 is the most powerful photon torpedo tube currently in service with the Federation. It can fire twelve torpedoes every at once, and currently is only fitted to the Sovereign class battlecruiser

Pulse Fire:

Developed for the Akira class, the Pulse fire tube is a modification of the burst fire tube. The loading and pre-fire stages can hold up to four photons simultaneously, but the launch tube itself is only of sufficient size to fire one weapon at a time. The pulse fire tube therefore fires four rounds in one second, then pauses for three seconds to reload with the next four photons. Overall rate of fire is therefore one torpedo per second

Micro Tube:

This system was developed to arm small vessels such as Runabouts and shuttlecraft. It fires a compact torpedo with a much smaller warhead than the standard models