Auto blocade is a UNSC blocade and is consisting of 16 ships; 3 destroyers, 6 frigates, 6 light frigates, and 1 super frigate. Its headship is the UNSC Dawn After Dark, and back up ship is the UNSC Cry of the Lion.

Auto Blocade ships (known)
Dawn After Dark frigate
independence light frigate
time killer destroyer
Cry of a Lion destroyer
unknown x3 destroyer x2, frigate
octagon super frigate

Though 8 ships of the ships are unknown, they were still seen during battles. After stopping a lead out to earth, the Covenant supercarrier, the detonater came out of slipspace, along with the covenant corvette, Kioz, and started to destroy the small blocade.