"Heavily stabilized partially internal barrel fires the longest range 68mm shell in a compact profile."
The Zenith is a Commoncannon. It has long range and a good fire rate for its type, but lacks damage. However, the low range means it can pick-off smaller enemies, or cripple powerful ships, before engaging in a full fire fight. Being in a small slot, it can be extremely useful in early game progression but not so much mid or late game.