the bow of the BRDM-2. While in its traveling position, it serves as additional armour. Armament The armament is the same as the BTR-60PB armoured personnel carrier; a 14.5 mm KPVT heavy machine gun with a coaxial 7.62 mm PKT general-purpose machine gun as a secondary weapon, both in a small conical BPU-1 turret mounted on the hull in a central position above the belly wheels. The 14.5 mm KPVT heavy machine gun has a practical rate of fire of 150 rounds per minute and a cyclic rate of fire of 600 rounds per minute. It has an effective range during daylight operations of 2,000 m. It can penetrate 20 mm of armour at a range of 1,000 m and 30 mm of armour at a range of 500 m. It can also fire at air targets, in which case the tactical range is 1,400 m. It uses the 14.5 mm API-T, 14.5 mm I-T, 14.5 mm HE-T, 14.5 mm and MDZ type ammunition. The 7.62 mm PKT coaxial general-purpose machine gun has an effective range during day time operations of 1,000 m while the vehicle is stationary and from 400 m to 500 m while the vehicle is on the move. It is fired in 2 to 10 round bursts and has a practical rate of fire of 250 rounds per minute and a cyclic rate of fire of 650 rounds per minute. During daylight operations, the gunner uses the PP-61AM sight, which has a field of view of 23 degrees and x2.6 magnification. The BPU-1 turret is unusual because it has no top hatch opening. Contrary to the popular belief, the BPU-1 turret was originally designed for the BRDM-2. The turret was later used in the Soviet BTR-60PB, the Polish SKOT-2A and the Czechoslovak OT-64A. The turret allows the armament to be elevated between −5 and +30 degrees. On the left side of the turret, there is an air inlet on the hull top. There are also two air-inlet louvers in the forward part of the engine compartment's roof and four smaller air-inlet louvers to the rear. Both sides have centrally placed vision blocks. The vehicle armor, which is composed of welded steel, protects it fully against small arms fire and small shell fragments; but doesn't protect it against big artillery fragments or .50-calibre machine gun fire, which can penetrate the BRDM-2's maximum armor of 14 mm. The