OWO-3 was a battle droid who served as a gunner aboard the Trade Federation flagship, the modified Lucrehulk-class LH-3210 cargo freighter Saak'ak. In the year 32 BBY, shortly before the Invasion of Naboo, Chief Gunner Jull Dremon ordered it to destroy the Republic Diplomatic Corps Consular-class space cruiser Radiant VII, which it carried out with accuracy.