How is the sea fog formed?

Sea fog is formed under the direct influence of the ocean. 1On the night of July 25th, 956, a brightly lit Swedish passenger ship "Stockholm" sailed at night in the foggy sea, and it searched the sea ahead with radar. It was very fast, so it left new york far behind soon after it set sail.

On the way forward in Stockholm, another Italian passenger ship "doria" has crossed the Atlantic Ocean and is approaching new york Port under the guidance of advanced radar search.

At 22: 30 p.m., the doria passed near Nadakote Island and headed west at a speed of 23 nautical miles per hour. At 23: 30 in the evening, the doria had sailed to 46,300 meters west of the lighthouse. When it is about to arrive in new york, the passengers are immersed in a joyful atmosphere. Suddenly, after a loud noise and vibration, I saw that the bow of the Stockholm was advancing towards the starboard center of the doria. The ship suddenly caused a commotion and people panicked.

At that time, the speed of doria was 23 nautical miles per hour, and that of Stockholm was 18.5 nautical miles per hour. The relative speed of the two ships is above 40 nautical miles per hour, so the collision is very serious.

Especially when the ship "doria" was badly damaged, the captain ordered the operator to send out a distress signal. Two French ships sailing in the nearby waters rushed to the scene after hearing the distress signal, and rescued 1654 victims on board, and 52 others died and disappeared in the collision. 1 1 hour collision, the huge body of the Italian passenger ship "doria" finally disappeared in the rolling waves of the Atlantic Ocean.

Although both ships are equipped with advanced radars, when the ships sail near land waters, radar waves will be disturbed by the shadows of land and islands, and it is impossible to find the targets covered by the dead corners of their masts in time. Coupled with the interference of radio transmitting antenna on land, the function of radar is greatly reduced, which leads to the tragic tragedy of ship wreck and death.

Brief narration

Maritime navigation is often blocked by sea fog, and even causes shipwrecks. During and after the Second World War, people made a special investigation on sea fog.

The weather situation, air stratification and its physical and chemical properties related to its life and death process are analyzed and studied, which lays a certain foundation for exploring the forecast of sea fog. According to different causes, sea fog can be divided into advection fog, mixed fog, radiation fog and topographic fog.

sea fog