How many times had it dawned, nobody knew, the submarine swam deep dark waters. The clock only told the time. Everybody wanted some fresh air and the submarine went to the surface. Light again! And a fresh sea wind!

“A man is really not a fish,” sighed the beautiful woman doctor and smiled to the man teacher nicely.

“A man not,” he replied, “but you seem to me a pretty sexy dolphin.”

“But not for the little fish in your trousers, don’t be silly!” she sprinkled him with a handful of sea water.

“Not alone!” pointed the man policeman to the horizon. “We’re not alone! A ship, there! A sail ship.”

Fireworks of great gladness and happiness exploded on board the submarine: “Not alone! Not alone!”

“Let’s shoot a flare in the air.” Several flares of different colors flew up to express their desire to communicate with other human beings, to shake hands, to embrace them.

“Try to get them on the radio,” was the Captain’s command. He was still watching the sail ship through his binoculars coolly and silently.

“No answer, sir. I’ve tried many times.”

“Try again. We have to negotiate, firstly.”

“No answer, sir. They seem to have not saved or not invented the radio, yet.”

“It seems so,” said the Captain calmly, “and they haven’t invented the engine, too. They are sailing nearly against the wind. Good sailors.”

“Not bad,” was the policeman’s comment. He was watching the sail ship through his binoculars, too, “but they have invented the guns. The gun is a simple and reliable machine.”

“And they are loading guns, and are sailing full speed against us.”

“Shit,” was policeman’s next commentary.

“Are they loading the cannons with cartridges from behind or without cartridges from the top?” asked the Teacher.

“From behind,” replied the Policeman.

“They have though saved something from the Civilization. But they are basically in another epoch. And we are in another,” continued the Teacher, “we’ll have to teach them.”

“No,” concluded the Captain, “they want our land and our ships, our better saved knowledge from the Civilization, our technologies. They are pirates.”

“And may be not,” protested the Doctor. But the first shot was the answer. The enemy ship was shooting.

“Curtain fire!” commanded the Captain loudly. “I want an iron curtain, a fire curtain! Everybody into the submarine! Submerge!”

“Ten feet under water,” reported someone, “fifteen feet, twenty feet…”