From Halopedia, the Halo wiki
A patrol corvette, also referred to as a customs corvette, is a class of corvette used by the Gao Ministry of Protection to patrol Gao space and enforce customs upon ships entering the planet's orbit.
The patrol corvettes are lightly armed and poorly shielded, and a fleet of the corvettes are completely outgunned by a Marathon-class heavy cruiser. Patrol corvettes are armed with eight missiles and, unusually for a human ship, a single plasma turret. The flag cabins of the corvettes have wall-size video displays.
Ships of the line
List of appearances