Did they make a misprint here? because they way they talk about...

Did they make a misprint here? because they way they talk about this, they seem to be saying the metalstorm weapon already exists? also worth noting is the reference to the future weapons for underwater firing.

Advances in below-water weaponry
other advances may provide new challenges. Super-cavitating bullets could produce an underwater close-in weapon system (CIWS) capable of engaging torpedos during their terminal-homing phase.

SEA POWER CENTRE - AUSTRALIA

http://www.navy.gov.au/w/images/Working_Paper_19.pdf

STRATEGY Naval gunnery now employs rocket-propelled munitions,improved computer-aided targeting and rapid-fire technology such as Metal Storm (one million rounds per minute, infinitely variable rate of fire).50 Rail guns and pulsed power systems are now being developed for electric ships that will still be in service in 30 years time.51Missile technology, whether ship, submarine or air launched, arguably demonstrates the same trends. Terminal homing capabilities now exploit third-party guidance (e.g. laser designation) as well as providing options to home on heat or infra-red signatures. Similarly, laser technology continues to produce potential weapon applications, including missile defence. Solid-state laser technology will permit efficiencies that allow employment on naval vessels. High power microwave weapons are also on the horizon (2010), and variants called Masers (Microwave Amplification by Stimulated Emitted Radiation) may permit the employment of multi-megawatt pulses of radio energy against the electronics in missiles, UAVs or aircraft.52The ‘effects’ of these developments against air, land or sea targets include extended range, improved rate of fire and, in some instances, improved accuracy and effect. Advances in below-water weaponry, like sonar technology, continue relatively unabated. The future generation of torpedoes and mines may be able to: recognise and counter most decoy systems; recognise and target specific vessels; exploit bottom topography to aid stealth while homing; and engage at extended ranges that negate improvements in counter-detection technology, while remaining undetected until a point at which the kill probability approaches certainty. However, other advances may provide new challenges. Super-cavitating bullets could produce an underwater close-in weapon system (CIWS) capable of engaging torpedos during their terminal-homing phase.53In fact, Dunk suggests that submarine technology advances will outpace anti-submarine developments, citing a reduction in effectiveness of maritime patrol aircraft as one likely result.54Again, the pace, complexity and diversity of developments render it difficult to predict a resultant ‘balance of power’ between stealth and detection. Perhaps it is more productive to simply surmise that weapon engagement ranges and accuracy are likely to improve. However, a significant shift in the balance could result from a revolutionary development, such as the ability to ‘see’ underwater to a range of 30 nautical miles or more, or the ability to consistently destroy torpedos or mines prior to impact/detonation. Similarly, electromagnetic interference technologies may find significant utility against a network-enabled opponent.Hypotheses aside, the net effect of naval weapon development seems to point toward increasingly accurate, longer range, more reliable systems with greater rates of fire and