Mark 9:
A torpedo is a self-propelled, self-guided weapon. Torpedoes of some type
were part of the standard weaponry of most Starfleet vessels in the 22nd to
24th centuries.
Torpedoes were primarily used in space combat as an alternative to directed
energy weapons such as disruptors and phasers. Torpedoes could be configured
before launch to fit various specifications. Normally a torpedo was equipped
with a warhead, and the explosive yield of this warhead could vary depending
on the type of torpedo. Torpedo launchers brought the weapon into the launch
tube and allowed fire control from the ship's bridge, although a torpedo
could be launched manually. Most of the time a tactical officer was
responsible for target acquisition and launch sequence.