The Typhoon-class submarine could stay submerged for 120 days in uneventful conditions. However, that amount could be further ...

Key Points – Russia’s Typhoon-class (Project 941 Akula) submarines, the largest ever built, were formidable Cold War-era nuclear ballistic missile platforms (SSBNs) designed for strategic ...

However, the class of submarine used was very real. Soviet Typhoon-class subs weren't just among the biggest, they were the biggest military submarines ever made.