Osumi kaikyo is located in JapanKyushuTo the south of the island, roughly in the southeast northwest direction, passing throughDayu Islands。The west to east on the north side of the strait are Black IslandSuhuang Island(NotWorld War IIinIwo JimaIwo Jima in the battle), Takeshima (not located inSea of JapanJapan and South Korea) and Kyushu Island.West to east on the south side of the strait areKouyong Ryobu Island、Ukushima、Ma Mao Island、Seed Island。On the northern side of the straitKagoshimaThere areKagoshimaPort, reliable berthing 10000 ton ships,the Second World WarChina, once Japannaval shipsBerth;In the south is Xizhibiao Port, which can reliably berth ships below 5000 tons.Neizhipu on the north side of the east mouth of the strait and Neizhipu on the south sideSeed Island, forJapan Space Launch Center。
Dayu Strait is connectedthe pacific oceanandThe East China SeaThe waterway (130 degrees and 30 minutes east longitude,30 degrees north latitude40 points).It is an important sea route between the coastal ports of the East China Sea, the Yellow Sea and the eastern ports of Japan7th Fleet Common channel of.The specific sea area specified in Japan's territorial sea law is 3 nautical miles wide, and the center is an international channel.[1]
There are many channels in this strait, among which, the bamboo island in the north of Dayu Strait——KagoshimaThe southern tip of the peninsula is about 29 kilometers away.
topographic features
Dayu Strait runs from northeast to southwest, with a length of about 24 kilometers and a width of about 33 kilometers, and the narrowest point is between Sado Cape and Zhudao Island, with a width of about 28 kilometers.The water depth is 80~150m, and the bottom is muddy, sandy and coral.In the straitreefFew, no obstacle to navigation, suitable for ship navigation and submarineUnderwater navigation。SubtropicalMarine climate。
Climatic characteristics
Diagram of high seas, territorial seas and internal waters of Dayu Strait
Average temperature: 6.5 ℃ in February, 34 ℃ in August.Annual precipitationAbout 2000 mm.From November to next Marchnorthwest windThere are often storms in early autumn.There is fog from March to July, and the fog is the most in June.Tidal genusSemidiurnal tideThe rising tide is westward and the falling tide is eastward, with a flow rate of 3~3.8 knots.Currentthe kuroshioMainly, flowing to the northeast, with a flow rate of 1-2 knots;There is a cold southwest current along the coast of Dayu Peninsula.The surface water temperature is 21~25 ℃, and the salinity is 33.5 ‰~35.9 ‰.The transparency is 16~30 meters, reaching 48 meters in August. Submarines are easy to be exposed during underwater navigation.
strategic role
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Dayu Strait
Dayu Strait starts from the East China SeaKorean Strait—Sea of JapanIt is an important passage to the northwest Pacific Ocean.Dayu Strait is a non territorial strait, but it is completely located inJapanNationalexclusive economic zoneInside.
The width of the Dayu Strait is less than 24 nautical miles. According to the international practice of 12 nautical mile territorial sea width, the Japanese government can completely classify the Dayu Strait as its own territorial sea, so that other military ships cannot sail into it without authorization.However, for the convenience of the US military, the Japanese government has made a special provision that the width of the territorial sea is 3 nautical miles for five straits that could be classified as territorial sea, leaving the waterway of non territorial sea.
JapanThe government did not set the width of the territorial sea as 12 nautical miles, and gave it to the US military separatelyRight of way。Because the Japanese government is evading“Three non nuclear principles(No manufacturing, no ownership, no transportationnuclear weapon）This is about nuclear weaponsBasic policiesThe US military has nuclear weapons.
If there is no special provision for the width of the territorial sea to be 3 nautical miles,Home portbe locatedYokosukaOf7th FleetTo get in and out of the East China Sea and the Yellow Sea, you need to detour southwardOkinawa Islandsouthwest.And they cannot enter the Sea of Japan.
Right of way
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The distance between Zhudao and the southern end of Kagoshima is about 29 kilometers
Navigation right: similar to that between mainland China and TaiwanTaiwan Strait, Yesinternational watercourseShips from Japan, South Korea and other countries can pass through.
According to Japanese territorial waterslegal systemJapan implements 12 nautical milesBreadth of territorial sea, but onSoya Strait 、Jinqing Strait, Dayu Strait andDuima StraitEast and west waterwaysThree nautical mile territorial sea width is applied to five sea areasSo as to leave a space in the middle of the straitexclusive economic zoneChannel, making these five strait waterwaysNon territorial strait with free navigation system。Other straits are more than 24 nautical miles wide, such asMiyako StraitIt also constitutes a non territorial strait.However, in addition to these non territorial straits and JapanInternal waterOutside the fairway, includingtokara strait Occurred in 2004Han class nuclear submarineMost Japanese strait waterways, including Shigaki waterway, are applicabletransit passage systemThe straits used for international navigation [2].
Rights protection activities
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2003
On November 12, 2003,Chinese NavyA normal cruise training, including one 035 "Ming" classConventional powered submarinewithSemifloatingWhen traveling westward through the Dayu Strait, the sea self-defense force deer houseAviation basefirstAir fleetTwo P-3C "Orion"antisubmarine patrol aircraft IsKyushuKagoshimaThe P-3C pilot was very nervous when he was carrying out a patrol mission over the county, so he immediately askedDefense AgencyThis is reported.The Defense Agency ordered the patrol aircraft to continue tracking and surveillanceChinasubmarine.In the following hours, the Japanese patrol plane has beenChinese submarineThe sky hovered, but the Chinese submarine sailed normally without any abnormal activity.During this period, the Japanese patrol aircraft kept in contact with the Defense Agency, and the interior of the Defense Agency was also working intensively to study the next step.After confirming that there is no "threatening movement" of Chinese submarines, the Maritime Staff Supervision Department of the Defense Agency announced the news.According to the Japanese side,Japan Defense AgencyI also put thisInformation circularYesUS troops stationed in Japan, which will be dispatched immediatelyReconnaissance aircraftTogether with Japanese patrol aircraft, they tracked and monitored Chinese submarines.However, there has never been any dialogue or contact between Chinese submarines and Japanese and American reconnaissance aircraft.Before long, the Chinese submarine dived into the water and disappeared into the vast sea.
2012
April 30th
On April 30, 2012, two frigates (529, 530) and one intelligence gathering ship (851) of the Chinese Navy crossed the Dayu Strait from west to east and entered the Pacific Ocean.For the Japanese media's report on the Chinese navy on April 30naval vesselsThrough relevant reports on the Dayu Strait,Information Affairs Bureau of the Ministry of DefenseOfficials said that,PLA NavyFleetThe training in the western Pacific is a routine arrangement within the annual plan and does not target any specific country or goal[2]
June 14th
The Chinese Navy's "Ming" Class Submarine Appears in Dayu Strait
Japanese Integrated Staff Supervision DepartmentOn June 14, it was announced that afterJapan Maritime Self Defense ForceThe "P3C" anti submarine patrol aircraft belonging to the first aviation group was confirmed at 1:00 p.m. on the 13th（Beijing TimeAround 12:00 p.m.), three Chinese navy warships were sailing from the East China Sea to the Pacific Ocean in the sea area about 410 kilometers west of Ukushima, Japan.The three warships are respectively "115"Missile equipped destroyerNo. 528The guided missile frigateAnd "881"Supply ship。According to the news, three warships of the Chinese Navy then sailed eastward through the Dayu Strait and entered the western Pacific waters.
The Ministry of National Defense of China announced on June 13 that,Chinese Navy fleetThey will go to the Western Pacific for training.This training is an annual routine training, not aimed at any specific country and goal, and conforms to relevant international laws and practices.[3]
2013
Formation officers and soldiers
KyodoSaid on the 8th,ministry of defense One Chinese navy ship was confirmed on the same daydestroyerAnd 1frigateSail westward through the Dayu Strait in Kagoshima, Japan.This is the second time that Chinese warships passed through the strait after June 2012.
On August 22, 2013, after more than two days of sailing, the Navy North Sea Fleet guided missile destroyerQingdaoShip, missile frigateLinyi ShipAnd integrated supply shipHongze Lake ShipThe 113 warship formation entered the Pacific Ocean through the Dayu Strait.Formation islocal timeThose who entered the Dayu Strait at 7:40 am, after 5 hoursNarrow channel navigationThe ships passed through the strait in turn.Affected by No. 13 typhoon "Tanmei", the formation encountered bad sea conditions since it set sail. The command post adjusted the route in time to avoid typhoon, and carried out targeted training in the environment of strong wind and waves.During the voyage, the swearing in ceremony of "chasing the dream of a strong military and marching boldly to Dark Blue" was also held.[5]
2014
On June 22, 2014, three warships of the Chinese Navy returned from the open sea waters of Dayu Strait and were againJapan Self Defense ForceTracking and shooting of aircraft and ships.
On June 22, the website of the Integrated Staff Supervision Department of the Ministry of Defense of Japan announced that after passing the frigate "Chaoxue" of the 13th escort of the Japanese Maritime Self Defense Force and the first aviation groupP-3C antisubmarine aircraftIt was confirmed that at about 2:00 a.m. on the 22nd, Beijing time, the Chinese Navy's two missile frigates and one integrated supply ship were sailing from the Pacific Ocean to the East China Sea in the sea area about 110 kilometers east of Tanegashima Island.Subsequently, Japanese ships and aircraft confirmed that three Chinese warships returned via the Dayu Strait.[1]
Kyodo News AgencyAccording to the report, this is the second time that Chinese ships have sailed in the strait since last August.As Dayu Strait is an international strait, foreign countriesShip navigationThere is no problem in international law.The Japanese Defense Ministry said that three warships sailed to the Pacific Ocean on June 7 through the high seas between Okinawa and Miyako.It may be that after training in the Pacific Ocean, he passed through the Dayu Strait on his way back on the 22nd.[1]
2017
According to the communique issued by the Ministry of Supervision of the United Staff and Staff of Japan on March 6, on March 5, the waters near Tanegashima Island of the Chinese Navy fleet passed westward through the Dayu Strait,Self Defense Forceemergency take-offP-3C anti submarine aircraft approach monitoring!This time, there are three ships forming a fleet, namely: 052 Class A destroyer 112Harbin Ship054A frigate 579Handan Ship903A Integrated Supply Ship 960Dongping Lake Ship。
2021
It was reported on the 14th that the Ministry of Supervision of the Integrated Staff of the Ministry of Defense of Japan announced on the same day that four Chinese navy ships, including two missile destroyers, one supply ship and one intelligence gathering ship, had passed the Dayu Strait between the Dayu Peninsula and Tanegashima Island in Kagoshima Prefecture and entered the East China Sea from the Pacific Ocean.[7]
The Ministry of Foreign Affairs of China said that for a long time, Japan has closely tracked, monitored and interfered with Chinese ships and aircrafts, endangering the safety of Chinese ships and aircrafts, which is a trigger for China Japan sea and airsafety problemThe root cause of.However, the Japanese side did not realize the danger of its own behavior, instead, "the thief shouts to catch the thief" and "the enemy is fighting", exaggerating the threat of China.The Ministry of National Defense of China has repeatedly warned the Japanese side that the Chinese side strictly requires the Japanese side to stop all acts that interfere with China's normal military activities and ensure that similar events do not occur again.Otherwise, all consequences arising therefrom will be borne by Japan.China reserves the right to take further measures.[6]
