At the age of fifteen in 1923, he began to realize his ambition in life. After several years of hard work, he became the captain.

When a bright future waves to him, the economic crisis has arrived.

As the fleet was reduced in size, Prien lost his job. Prien, who was trapped in despair, followed the rising Workers' Party and began his new life.

Prien first went to the light cruiser Konisburg, and was then sent to the submarine training school in Kiel for training.

During the Spanish Civil War, he patrolted two times on the U26 submarine under the command of Captain Weiner Hartmann. Last year, he became the current submarine commander.

On the entire submarine, only Prien knew that his destination this time was Scapa Bay, since he had just left the port, so he has been studying it for the past few days.

Scapa Bay is 24 kilometers long from north to south and 13 kilometers wide from east to west. As an important port of the Royal Navy, the defense here is not ordinary.

After all, during World War I, German submarine captains hoped to get here to attack.

It is also easy to defend submarines. This port has 7 entrances, all with anti-submarine nets and minefields are also installed.

The anti-submarine net is very simple, just like an ordinary fishing net, arranged underwater. In this way, the warships on the water will not be affected. However, the submarine sailing underwater will hit the head-on. Once the propeller is wrapped around the net, it will be powerless to turn the world back. There is no other way except to float out of the water obediently.

At the same time, the rainbow operation in the past few years, those German shipwrecks would also cause inconvenience to the navigation of submarines.

However, these underwater facilities have existed for many years after all, so many of the equipment have become aging.

For example, the entrance to the Kirk Strait near the land to the east of Scapa Bay, which is the 7th entrance, has lost its due role. In the past few days, the British Navy has demolished the place and is preparing to renovate it!

This is the only opportunity!

The submarine's hull suddenly tilted and grabbed the handrail beside him. Captain Prien looked calm. He understood very well that the sea water outside was too surging.

The entire Holm Strait is turbulent, and this is almost an impossible area for submarines to reach. Only when submarines sail at full speed can they flow up against the water. Once they sail at full speed, the huge noise will be exposed to the British.

Now, he could only sail silently at low speed. Now, a sudden intrusion of water almost made his submarine stop, but he still did not give up.

Wait for the opportunity!

A few minutes later, suddenly, a bigger shaking came!

"Be careful, be prepared, we are about to enter Scapa Bay!" Captain Prien said.

Coming soon!

The huge shaking just now was in the opposite direction. This was the gate of the Hawkesan Strait. This current of water was just enough to rush the submarine into Scapa Bay. This was their only chance.

Sure enough, the entire hull became lighter and faster under the action of an ocean current!

As a submarine commander, you must be proficient in using ocean currents! In this way, even without relying on engines, submarines can sail! Historically, this is how German submarines entered the Mediterranean.
Chapter completed!