USS San Francisco was one of the first Los Angeles-class nuclear attack submarines of the United States, built in 1972 and commissioned on April 24, 1981. It is also the quietest submarine in the US Navy. The bow part of the ship was crushed after hitting a mountain. Photo: National Interest USS San Francisco has a displacement of 6,900 tons when submerged, 110 meters long and 10 meters wide. The train is equipped with a General Electric PWR S6G nuclear reactor with a capacity of 35,000 horsepower, helping it to move at a maximum speed of 61km / h. According to the National Interest, the accident occurred with the Los Angeles-class submarine USS San Francisco (SSN-711), on January 8, 2005. At the time of the collision, the ship was near Guam conducting training and preparing to sail to Australia. At that time, the ship was diving at a depth of 160m and moving at a great speed, more than 48km / h. The impact was very strong. The sailors present in the dining room were thrown into the air. In a 60-minute interview, Brian Barnes, a submariner, recalled: “I just saw people lying everywhere. Glass was broken, dishes were splattered, sailors groaned from their injuries, screamed.” The bow of the USS San Francisco was severely damaged, 30m of the front hull was flattened and exposed to the sea. Water flooded the submarine. The urgent task at that time was to urgently pump compressed air into the ballast tanks of the submarine to help the ship float to the surface. The USS San Francisco has a total of 127 crew members. The collision left 98 people injured and many of them were unable to continue operating the ship. Sailor Joseph Allen Ashley was wounded in the head and later died. Another sailor broke both arms but still managed to open the submarine’s air valve to fill the ballast tanks. Danny Hager, who monitors the submarine’s depth gauge, had a terrifying experience after the valves were opened. “I told everyone that the ship was at a depth of 160m. And I kept waiting, 5 seconds, 10 seconds passed and so on I don’t know how much longer, the ship was still at a depth of 160m. The atmosphere is very calm because everyone is waiting for me to announce that we are preparing to come up.” The problem was that the ballast tanks at the front were broken in the collision. The air escapes to the outside. 60 seconds passed and the ship remained unchanged in depth. Fortunately, the aft part of the submarine began to point upwards as the ballast tanks at the aft were filled with compressed air. Danny Hager now feels less worried: “It feels really relieved when I announce the ship has risen to a depth of more than 152m”. Finally, the USS San Francisco also surfaced, but the journey home is still quite far. Fortunately, the nuclear reactor was not damaged in the impact. The crew steered the ship back at a speed of 16km/h and so to return to Guam, it took the ship 52 hours. Unexpected causes Despite its immense firepower and nuclear propulsion, the USS San Francisco, like all submarines, relies on charts providing data on the topography of the seabed. After the investigation, the US Navy found that the submarine used old charts that did not mention the submarine mountain range in the area of ​​​​the ship’s operation. Meanwhile, other maps warn about this mountain range. The charts used by the crew of San Francisco were provided by the Defense Mapping Agency in 1989. By 2008, a study by the University of Massachusetts showed that images obtained from the Landsat satellite showed An underground mountain range more than 30m above the seabed in the area. However, the US Navy did not update this information to the chart. During the repair, the bow of the USS San Francisco was removed and replaced with the bow of the submarine USS Honolulu, which was about to be decommissioned. USS San Francisco rejoined the fleet in 2009 and served for another seven years. It was later converted into a training submarine. Ship commander Kevin Mooney was reprimanded for this unfortunate accident. Several sailors received medals for their brave actions when the ship was in distress. Only the sailor who died Ashley is inscribed at the Navy Memorial in Washington DC So how could the ship survive the high-speed crash into the underground mountains? In 1963, after the sinking of the submarine USS Thresher, the US Navy established the SUBSAFE program. The goal of this program is to ensure that the hull will remain pressurized in the event of an accident and that it can float. This program makes keeping nuclear reactors safe and making them recover from accidents a top priority. If the ship can surface and the nuclear reactor continues to operate, the crew will have a good chance of survival. USS San Francisco has ensured those conditions. Thus, the fact that the USS San Francisco can “survive the accident” is the result of the dedication and relentless research efforts of the US submarine force.

To date, Japan has vaccinated only 2.8% of the population, the lowest level among developed countries. (Source: aa.com.tr) On May 12, the online system supports scheduling vaccination COVID-19 prevention in Japan was interrupted due to technical problems, raising concerns about responding to the country’s outbreak. NHK television reported that the vaccination scheduling crash occurred in many localities, including many areas in the capital Tokyo and the western city of Minoh, due to a global system failure involving the supplier. cloud computing Salesforce of America. In a statement on Twitter, Salesforce Chief Technology Officer Parker Harris said the company’s network was suffering from “ serious interruption . “Subsequent update notice indicated that Salesforce’s services were almost completely restored. Japanese Ministry of Health officials have not yet commented on the above information. Japan aims to be vaccinated by July COVID-19 for 36 million elderly people. However, so far, the country has only vaccinated for 2.8% of the population, the lowest level among developed countries in the world.

Ukraine’s secret weapon system is a series of missile launchers developed by the State Design Bureau Kyiv Luch in cooperation with other private and public Ukrainian defense companies.

MLRS can destroy infantry, armored and armored vehicle targets in the area where artillery batteries, headquarters and ammunition are concentrated. This system will allow the Ukrainian military to protect its borders, strait and territorial sea as well as naval bases and coastal infrastructure within missile range.

The mass-launch missile system was tested several times in 2018, while recent tests were conducted at a military training facility in Ukraine’s Odesa region in August 2019.

Russian website Rg.ru said that the 9P140 truck belonging to the MLRS series launch missile system of the Ukrainian army had a serious accident on the Odessa – Mariupol highway.

According to the latest information from the Ministry of Defense of Ukraine, the MLRS convoy is on its way to the city of Mariupol on the coast of Azov, to strengthen its defenses against a threat from Russia.

Initial information showed that a vehicle carrying the missile for the MLRS system lost control, crashed into the median side of the road and plunged down a roadside slope causing the vehicle to flip over many times.

The car was severely damaged, the cabin was completely destroyed and the most frightening thing was that 16 rockets fell out but fortunately they did not explode. There is currently no specific information on the casualties of the driver’s vehicle.

The original cause was identified as a technical problem from the driver’s part, and another reason highlighted by the Russian press was that the vehicle’s use status was too long and the lack of spare parts. cure.

The MLRS series launch missile system is mounted on the KrAZ-7634 8 × 8 truck chassis. The driver’s cabin is mounted in the front left part of the chassis. Located behind the driver’s cabin, a systematic launch cabin with launch and fire preparation equipment.

The total weight of the truck is 32 tons, while its load capacity is 18.8 tons. Power comes from the YaMZ-7511.10 turbocharged diesel engine paired with a nine-speed mechanical transmission system. The engine develops a maximum capacity of 420 horsepower and allows a top speed of 100km / h.

The MLRS system is based on the Soviet-era BM-30 Smerch heavy jet artillery system. Each system is controlled by a crew of 4 and is capable of firing rockets in either single or launch mode.

The launch mass of each 300mm missile is 800kg. MLRS is capable of destroying enemy targets at a distance of 130 km. The system can fire 12 missiles in just 45 seconds and hit targets with a ring failure probability (CEP) below 30m.

The MLRS has a new automatic fire control system, which can be operated in either automatic or manual mode. The fire control system allows automatic determination of the bearing angle of the launcher.

The MLRS missile uses a non-GPS navigation system to avoid the risk of signal loss due to interfering with satellite positioning or deceptive attacks. Each missile is powered by a solid engine and can be fitted with different warheads. Photo source: Pinterest.

A close-up of the power of the Smerch jet cannon – with 12 bullets that can destroy all life in an area of ​​67 hectares. Source: QPVN.