The BTR-70 was first shown in public during a military parade in Moscow in 1980. It replaced the BTR-60P in the russian army. While both vehicles have the same turret armament, the BTR-70 has two upgraded 8-cylinder 120-hp gasoline engines. Other modifications are the vision improvement for the troops, additional firing ports and an improved armor protection. The BTR-70 has a longer hull and a large gap between the front and rear sets of road wheels. Triangular-shaped doors are located in this space on both sides of the vehicle and give the troops access to the hull of the vehicle. A wave deflector is mounted on the front. The troop compartment gives cover to six infantry men which are seated facing out while each seat has a firing port and a vision block. As with the BRDM-2, the BTR-70 has a small conical turret with a 14.5-mm KPT machine gun and a coaxial 7.62-mm PKT machinegun. The BTR-70 is fully amphibious and is propelled in water by a single water-jet at the rear of the hull. The BTR-70 has good cross-country capability, high road speed, and large troop-carrying capacity. Its versatility and amphibious capability gives it a wide field of service. The big disadvantage is its relatively light armor protection. On later models the bow section was upgraded and some special layered armor was added. The BTR-70 is equipped with an NBC protection system and an automatic fire detection/suppression system.