The Patrol Fleet are scouts, flying ahead of the flotilla on the lookout for mineable bodies and hostile forces. They scan space with VI-systems that pick up heat signatures or other signs of foreign vessels. As the first ships to be targeted in any conflict, some of the quarians' finest engineers monitor and repair the Patrol Fleet's shielding. The fleet's commanding officer, Admiral Shala'Raan, relies on speed and shields during combat.
- If the player chooses to rewrite the heretics in Mass Effect 2.
Rewriting the geth heretics significantly boosted the processing power of the "true" geth. Their increased strength made their fleets both more efficient, and more lethal, in battle.