I didn't realize how big the submarine actually was

- Ohio class - US' largest: 18,750 tonnes displaced submerged, 170m long, 13m beam

- Typohoon-class - USSR's biggest: 48,000 tonnes displaced, 175m long, 23m beam

- Oscar II-class (Kursk) - 19,400 tonnes submerged, 154m long, 18.2m beam