Type 272 Sea-ice icebreaker
The second generation Haibing [Sea Ice] 722 ship is the first Type 272 icebreaker received by the Chinese Navy. Designed and built by China, this type of ship is characterized by good design performance, high degree of informationization and strong ice breaking ability. Haibing 722 Type 272 icebreaker started construction in November 2013, launched in March 2015, and entered service on December 28, 2015. Haibing 723 Type 272 icebreaker is the second new type of icebreaker independently developed by China. The construction of the Liaonan Shipyard was held on March 17, 2016. The naming ceremony was held at the test ship center of a test base.
The length of the ship is 103.1 meters and the width is 18.4 meters. With a displacement of 4,860 tons and a maximum speed of 18 knots, it can withstand winds of 12 and lasts up to 7,000 nautical miles. It has a helicopter platform and can take off and land a straight-8 helicopter. Te tonnage of this warship is only 4,800 tons. There are no weapon system installed at all. The location is one of the indispensable equipment of the Chinese Navy. Without its guarantee, when all kinds of military ships sail in the winter, they will have to go through the ice, and they can only wait for the weather to improve until the ice layer dissolves, and then sail.
In the coastal waters of northern China, every winter, due to the cold current, a layer of sea ice is formed on the sea surface. It will not only block the military port, but also affect military training. It will also have a small impact on civilian ships, and may even cause ship damage. Major accident. Therefore, sea ice, which is associated with tsunami, storm surge, disaster waves and red tides, is called one of the five major disasters of the ocean.
Built on high-strength manganese steel, this icebreaker is distinctive and looks very strong. Its hull deck is up to 24 mm thick and can withstand ice up to 1 meter thick. It uses a hull to crush the ice layer directly; if the ice layer is too thick, it is a collision method, first reversing, then crushing the ice layer at full speed; there is a very special way: let the icebreaker rush to the ice, The ice is then crushed by its own gravity. In this way, it can search and rescue ships and people trapped in the ice area, and can also provide ice-breaking services for other ships. Because it is a service ship, its maximum speed is only 18 knots, but the battery life is 7000 nautical miles, the wind resistance is up to 12, and the stern has a large helicopter platform, which is enough to take off and land the helicopter. It is also a multi-purpose support ship. For example, a crane is specially installed to carry out ice layer sampling and other tasks, and patrols can also be performed. On 13 January 2017, Haibing 723 icebreaker completed the hydrometeorological survey of 15 sites in the sea near Bohai Bay and Laizhou Bay, and successfully arrived in the northern part of the Yellow Sea to carry out ice survey missions. After four days of sea ice survey, Haibing 723 icebreaker has completed nearly half of the task of the Huanghua Sea Ice Regulation. Currently, four sites in the northern part of the Yellow Sea are conducting ice survey missions. Hydrometeorological data obtained from these days. In view of the fact that large areas of ice floes were not found in the Bohai Bay, Laizhou Bay and the northern Yellow Sea, the safety of marine development and maritime navigation was not threatened by sea ice.
The ice survey was divided into four groups: route, sea ice, hydrology and meteorology. The sea ice group was mainly responsible for ice sample collection, measuring and recording sea ice thickness, temperature and uniaxial compressive strength, while the hydrological group required fixed-point timing observation. Sea surface temperature, determination and recording of collected seawater samples and sea ice samples.
During the investigation, there was an obvious cooling process in the northern part of China. Due to the influence of cold air, the northerly winds of the sea area were surveyed at 6 to 7 levels, the wave height was 2 to 3 meters, and the sea level was 4, which caused the navigation and ice adjustment operations. Great impact. Due to the short duration of cold air, the hydrological data of the past three days showed that the sea temperatures in the Bohai Bay, Laizhou Bay and the northern part of the Yellow Sea were between 1.3 and 5.7 degrees above zero, and did not reach the freezing point. No ice floes were found on the sea surface. Up to now, the Navy Ice Survey Team has completed a survey of 15 sites and obtained 64 hydrometeorological data. Subsequently, the Haibing 723 icebreaker continued to travel to the northern part of the Liaodong Bay to carry out ice survey missions.
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