1949 I am from the future

()【97】Sea Jeep Attack

It was 9 o'clock in the morning, and the fog on the sea surface in winter was slowly dissipating, and the distance was a little gray.Anyone who has been a naval observer knows that the observation visibility on the sea depends on the height you stand at and the sea conditions and weather at that time.

The observation height is of course limited by the height of the observation platform of the ship. Generally speaking, according to the naval school textbook, the observer stands on the observation platform at a height of seven meters. If the water-sky boundary line in the distance can be seen "very clearly", what? What do you mean?That is to say, you feel as if you can see the ripples on the dividing line, and the water line can be seen clearly, which is called "very clear". At this time, your observation distance is more than 50 kilometers. There are even observers in the world who have discovered Records of ships of 60 kilometers or even 70 kilometers;

If you feel that the dividing line between water and sky is only "clear", that is to say, you can only clearly distinguish the sea surface and the sky, then your observation distance ranges from 20 kilometers to 50 kilometers;

If you feel that the water-sky boundary is only "barely visible", but the junction is blurred, and it looks like the sea and sky are connected together, then this is called "barely visible" in the observer's report. Sea state, the observation distance is between 10km and 20km;

There is also a "vaguely discernible" situation that is often seen in observer reports. To put it bluntly, at this moment, the sea-sky boundary line is simply a sticky sea-sky unity in the eyes of observers. The boundary line is in such a layer of color gradient, so the observation distance at this time is from 4 kilometers to 10 kilometers;

The worst case is called "completely invisible" by the observers in the report. At this time, the observation distance is less than 4 kilometers. What kind of situation is this and how bad can it be?That is torrential rain accompanied by strong winds and waves, and even the blackness of the five fingers can't be seen. Even after some ships collided with the opposite ship, the observers discovered the existence of the other party. It turned out that there was a ship in front of the eyes. !

At this moment, the second temporary mine-sweeping formation of the Qingdao base is in the third situation, which is what the observers said is "barely visible".The pale sun in winter was obviously not powerful enough to clear away the sea fog. The eyes of the three observers of 037 almost jumped out. Under the huge canvas awning on the top of the bridge, all three observers used Hold the grip of the observation telescope with both hands desperately, firmly lock the figure-eight rubber observation port of the fixed observation telescope on the head, press the body against the circular iron fence used to fix the body on the observation position, and tie the safety He squatted on horseback to resist the ship's turbulence caused by the forward assault at a high speed of 30 knots. Although the observation port of the fixed observation telescope was made of rubber, the faces of the three observation officers were already flushed. Even the red marks came out.

The captain Han Tingfeng and the deputy captain You Guanghua were also squatting, holding on to the railing with one hand, and fastening the binoculars to their eyeballs with the other. The dividing line between the sea and the sky.Where are they looking for?Whether the target is a fishing boat or a gunboat.

The "Sea Jeep" 037 submarine hunter is rushing towards the unknown ship at a speed of 30 knots on the sea surface. The speed of a knot at sea is one nautical mile per hour, and one nautical mile is 1852 meters. The ship is gliding on the water at a speed of more than 30 kilometers per hour. Although the structure and linear design of 55 exist for high speed, the hull structure has smooth curves, and it has been specially designed for wave adaptation and anti-pitch and roll , It is convenient for high-speed assault and rescue at sea, but the speed of 037 kilometers per hour is already a high speed even if driving on the road, not to mention the interference of wind and waves on the sea where there is no road.

So at this moment, the ship was bumping violently, and it became more difficult for the observers to observe. Why did captain Han Tingfeng choose to make a high-speed assault?Han Tingfeng's reason was: "Once one of the escort submarine hunters leaves the escort formation, it means that the protection of the minesweepers will be reduced by half, so we must go back quickly. And in case the enemy is found, we can also follow the information issued by the Navy Command." As mentioned above, continue to use high speed to get rid of the opponent's shelling and minimize the opponent's hit rate."

His idea is correct. The 037 submarine hunter was originally born for high-speed assault warfare. It was born under the guiding concept of "sea bayonet fighting", "land bayonet fighting" and "air bayonet fighting" all-round bayonet fighting. .Facing the cannon of a giant ship, a heavy artillery shot at 1000 meters is heavy, and it is also heavy at [-] meters. It is better to paste it at high speed to destroy the opponent and wipe out the living people on the opponent's bridge. It is a sharp weapon for killing people and robbing ships...

Besides, after 037s of radar modification, the 80 is equipped with a "ball" gun sight radar. The computer processes the course and speed of the own ship at a high speed, as well as the course and speed of the target ship, and immediately gives 5 seconds, 10 seconds, and 20 seconds. After bombarding the various parameters, the four gunners on the deck only need to follow the data within the time interval of the parameters, such as shaking the cannon within 5 seconds and firing on time at 5 seconds. After 5 seconds, use the 10-second parameters to adjust. Anyway, the gunners were completely freed from the complicated calculation work, and the only thing to test was the speed and accuracy of the manual firing of the four gunners on the deck, and the loading speed of the four loaders below the deck.

For naval guns, the shooting distance and hit rate are inversely proportional. The smaller the distance, the higher the hit rate. This relationship is like a cotangent function image on the positive semi-axis. The closer to the zero axis, the higher the hit rate. Obviously, if the hit rate is 8000% at 6000 meters, then it may be 13% at 4000 meters, 21% at 2000 meters, 40% at 1000 meters, and 70% at [-] meters. The higher it is, the closer it is to paste it, it is equal to hand-to-hand combat, and the guns are always fired. Of course, these data are bombardments in a static state. Generally speaking, the bombardment accuracy is basically only in a static state. Hit half of the fixed target.

This is also the reason why the navies of various countries in World War II most hope to get the enemy's bombardment hit curve. As long as the cotangent function image of the opponent's artillery is overlapped with the cotangent function image of the own artillery, the own side's The intersection point of the hit rate curve and the opponent's hit rate curve is the turning point of the bombardment benefit. As long as our warships always keep the hit rate within a distance higher than that of the opponent, the maximum benefit can be obtained.

Of course, if the artillery of the World War II warship encountered a fire control system ahead of the times like 037, then there is no need to compare. The two images have no intersection point at all. The hit rate curve image of 037 is always pressed on top of the opponent’s image. of.