When the submarine is sailing underwater, it mainly relies on sonar to search for the surrounding situation, and when it surfaces, it can rely on radar, and now nuclear-powered submarines have a huge displacement and plenty of space, so above the control tower, the radar has long been deployed, and now after surfacing the surface, the radar has also begun to work to search the surrounding sea and air.

For submarines, the enemy's surface ships and anti-submarine aircraft are most feared, and now with search radars, it is possible to detect various situations as early as possible.

Radar and sonar were working, searching the surrounding sea, and at the same time, the submarine began to continue its voyage south.

Two hours later, the sky is gradually white, in the Arctic Circle, this season is the time of the polar day, if it is on the North Pole, it will always be bright, as time goes on, the polar day continues to move outward, and when the summer solstice is reached, the polar day will move to the Arctic Circle, which is the maximum range that can be expanded.

At this time, the Arctic Circle is not yet a 24-hour day, but the night is already short.

The sun is obliquely shining on the Arctic Circle, facing the rising sun, and you can see that there are so many ice floes floating on the waters of the Arctic Ocean, and submarines are sailing among the ice floes.

The submarine was built with the sturdiness of the shell in mind, using Krupp's latest high-strength steel, which can easily dive to a depth of 300 meters, taking into account the Arctic environment.

When needed, it can directly break through the ice of the Arctic Ocean and float up, so there is no need to be afraid of these current ice floes, even if they collide.

"Hear low-speed propeller noise." It was then that the sonar crew spotted the target first.

The constantly floating ice floe limited the signal search of the air-to-sea search radar, and after the sonar pointed the way, the radar finally picked up a few vague reflected bright spots.

"Attention, dive to periscope depth and prepare for battle!"

In this area, all the ships sailing are Soviet ships, or American ships, and the goal of their arrival this time is to launch a sneak attack on American merchant ships!

The 6,000-ton nuclear submarine formed a huge whirlpool on the sea surface, as if it were a big shark, and dived into the seawater, leaving only a small periscope on the sea surface.

Standing in front of the periscope of the conning tower, Otto was constantly observing the sea, and at the same time, his own submarine was also sailing at a speed of 10 knots.

Due to the use of seven-bladed propellers and the laying of the first generation of silencing tiles developed by Germany on the surface, the silence of this submarine is quite good, and when sailing at a speed of 10 knots, it will not be detected by American sonar equipment at all.

After passing through the ice floes, Otto finally used his periscope to see the target on the sea in the distance, and suddenly he felt his breath become short.

Aircraft carrier?

The layout that goes straight to the deck, the bridge on the side of the ship, it must be an aircraft carrier, I didn't expect that the first voyage caught such a big guy!

It was a fleet, with a dozen cargo ships sailing on the surface, and the carrier was the first thing Otto noticed, and when he got closer, he could see it more clearly.

It is indeed an aircraft carrier, but it is not an attack aircraft carrier with a displacement of tens of thousands of tons, this should belong to the escort aircraft carrier, however, it is not one, there are three escort aircraft carriers, sailing with other cargo ships.

Otto knew something about this.

At the beginning, Germany ordered a batch of container cargo ships from the Newport News shipyard in the United States, and after Germany received them, they were transformed into aircraft carriers, or they could be used as aircraft carriers without modification.

Later, with the bad relations with the United States, the Americans suddenly discovered in the Pacific War that they needed a low-priced, reliable escort aircraft carrier, at this time, they found the Newport News shipyard, and after inspecting it, Nimitz and Roosevelt both made a decision, and the Navy placed dozens of orders for this kind of ship to be mass-produced.

This is the Casablanca-class aircraft carrier of the Americans.

Prior to this, even if it was a light aircraft carrier, it was rebuilt from a combat ship, but the escort aircraft carrier was converted from a merchant ship, so although it was an aircraft carrier, the displacement may be tens of thousands of tons, but it could not participate in the front-line battle at all, without any armor protection, without advanced damage control, it looked like an aircraft carrier, but as long as it was fired, it would be scrapped.

Therefore, such aircraft carriers are mainly used to escort merchant ships. They are generally deployed in front of a convoy of carriers, using carrier-based aircraft to reconnoiter and attack submarines, or to guide surface ships to carry out attacks. In addition to escorting escorts, escort aircraft carriers often play the role of transport ships.

Now, these three escort aircraft carriers, like other cargo ships, are responsible for transportation.

USS Manila Bay, the sixth Casablanca-class aircraft carrier.

The steam engine at the tail is rumbling, and in the Arctic Ocean, the harsh weather conditions make everyone have to be careful.

On the bridge, Colonel Ralph Davidson stood here, looking into the distance with a telescope.

On the surface of the sea, there are constantly drifting ice floes, and they should try to avoid those large ice floes to avoid collisions.

Fortunately, almost twenty hours of the day are lit now, allowing them to sail almost all the time during the day, but such sailing makes people even more tired.

"We're a navy, we're going to war, but now, we're a sea jeep." At this time, in another position on the bridge, the first mate Mitchell looked at the dense P-39 fighters on the deck and couldn't help but complain.

Now, the biggest enemy of the US Navy is the Navy of the island country, the Navy of the island country is raging in the Pacific Ocean, even the US Navy avoids its edge, and every naval officer is eager to fight, but he does not run to be a transport ship to transport weapons and ammunition to the Soviets!

After the Germans took control of the North Sea, the United States even had to venture out of the Arctic Ocean route, starting from Alaska and transporting it all the way along the northern coastal borders of the USSR to the White Sea, unloading supplies closest to Moscow.

The change of this role has made many people uncomfortable.

Hearing this, Ralph turned his head: "Now to help the Soviet Union, it is our inevitable choice, we must let the Soviet Union hold on, drag the Germans, if the Soviet Union fails, then we will face a dangerous situation of fighting on two fronts, think about it, we can't even deal with the island country now, if we deal with the German Navy in the Atlantic, we will definitely lose." ”

The idea that naval violence takes time, and that the United States must help the Soviet Union hold back Germany is now deeply rooted in the hearts of the people.

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