Forerunner picket cruiser

Picket cruisers were vessels used by the Forerunner Navy for orbital patrol and interdiction. Several of the cruisers were able to fit inside Didact's ship. Picket cruisers were triangular in shape. Looking from the top down, they would resemble an Arrowhead. It is known that they possessed on vacuum engine that provided thrust from the rear, capable of thrusting a picket cruiser to incredible speeds of mach 50 while in space. They also possessed a slipspace drive which could propel them over 1200 lightyears a day.

List of appearances
'''
 * Halo: Cryptum