Desna main gun 102-mm cannon of the Obukhov plant
His initial armament, as with the rest of the class, included four long-barreled 4″/60 Vickers-Obukhovski Pattern 1911 guns, one over the bow, and three crowding her stern. These could fire a 66-pound HE or 52-pound “Diving” shell at 12 rounds per minute, providing the crew was drilled properly, to a range of 17,600 yards. They were directed by a 9-foot Barr & Stroud 30x stereoscopic rangefinder of RN F.Q. 2 pattern.