The Bridger class photon artillery is a type of support unit used by the Federation. These vehicles are capable of firing powerful photon shells into enemy positions making it a deadly opponent on the planetary battle theatre. These shells are similar to Photon torpedoes but lacked a guidance system. This reduces the shells attempt at tracking moving enemy targets. However, against fixed based structures, it excels at its job. In order to commence firing sequence, the craft had to come at a standstill for it to orient its weapon system. (TOS game: New Worlds)