The Akula-class attack sub was a Russian submarine class in the 20th century. Akula class vessels used Shkval, an experimental torpedo developed by the Russians in the late 1970s, and improved upon since, which could reach a top speed of 100 meters per second, while an ordinary torpedo could travel at best 130 kilometers per hour; it operated on the principle of supercavitation, which reduced hydrodynamic drag by enclosing the torpedo within a self-generated bubble of water vapor and gas.
On February 7 1994 Serbian forces used a submarine of this class to confront Khan Noonien Singh's super sub SGK Kaur. It succeeded in damaging Khan's vessel with one Shkval torpedo before it was destroyed. (TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 2)
- Akula is Russian for shark.