Crazy Ivan is a set of simple fun rules enabling you to recreate underwater warfare of the near future.
"Contact, range three thousand yards."
"Firing solution locked and loaded"
Above, on the surface, the thunderous waves and force eight gale created a maelstrom of white water. Below the long slender metallic grey cigar of the hunter killer submarine, just over three hundred feet long, hung in the relatively calm depths of Atlantic. Unseen by human eyes, it slowly stalked its prey, a submarine tanker, a converted boomer, the once deadly missiles now replaced by tanks of crude oil.
The torpedo leapt from its tube in the forward part of the submarine in a burst of air bubbles, and cut a swath through the water. The torpedo's active sonar lashed through the water against the target's metal hull, contact confirmed, the torpedo changed its course and once again lashed out with its active sonar.
The converted boomer, knowing it was been hunted, attempted to lose the torpedo by making evasive manoeuvres, noisemakers and other decoy devices were launched, but it was to no avail. The torpedo knew where it was going, it was not going to lose its prey and ploughed onwards through the water.
The torpedo hit the hunted boomer just below the sail, and detonated in a thunderous explosion, ripping the outer hull of the boomer into shreds of metal. Cracks appeared in the inner pressure hull, and water under immense pressure forced its way in at such power and intensity that it cut through the thin metal of the technical components and fittings. The internal pressure hull began to quickly fill with water, attempts to stop the flow failed as internal watertight doors couldn't be closed in time.
Another torpedo raced from its tube, the boomer floundering in the water was an easy target. It detonated midway down the hull, another explosion, and large areas of the ship began to fill with water, as more and more cracks appeared in the pressure hull.
Though nothing could be seen, the boomer, slowly turned on its side and her bow turned towards the seabed, and began to sink.
"Resume original course and heading."