Russian manned spacecraft module. Cancelled 1989. Maneuver system consisted of two engines, each of 300 kgf. Expendable module for orbital maneuvering and experiments.
AKA: Navesnoy otsek. Status: Cancelled 1989. Thrust: 5.88 kN (1,322 lbf). Gross mass: 3,000 kg (6,600 lb). Unfuelled mass: 1,500 kg (3,300 lb). Height: 1.40 m (4.50 ft). Diameter: 3.60 m (11.80 ft).