The Delta III Soviet designation Project 667BDR Kaľmar (Squid), was a ballistic missile submarine. The Delta III class is a double hulldesign, with a thin low magnetic steel outer hull wrapped around a thicker pressure hull. It had two VM-4S (2 x 90 MW) PWR powering 2 steam turbines delivering 44,700 kW (59,900 shp) to 2 five-bladed fixed pitched propellers. It had 16 missile tubes, each with the R-29R liquid fuel missiles of 3 MIRVs each.