Development of the Shkval has continued through the 1980's and 1990's to the present day. Very little information is available about the Shkval II, the existence of which was made public by the Russian government in 1998. Rumours state a top speed of possibly 450+ mph (720 kph/h) and a vastly improved range, believed by some to be in the region of 60+ miles (100 km). The fact that the Shkval II is guided renders it vastly superior to the original Shkval. The Shkval II is thought to be able to supercavitate, then if need be slow down and reacquire its target, before speeding up and homing in for the kill. Yet newer techniques developed by Ukrainian scientists are believed to offer the possibility for high speed supercav guidance and maneuvering.