|
OPS-9
OPS-9 is a two-dimensional radar manufactured by Fujitsu. It is installed as an anti-water search radar on the Maritime Self-Defense Force's escort ship. Variations include OPS-9B and OPS-9C. The model numbers of the Maritime Self-Defense Force's electronic devices, including this machine, are generally based on the naming rules for military electronic devices of the U.S. military. It is for radar mounted on surface vessels, for detection / distance direction measurement / search. Overview This model was developed as a higher resolution X band radar for minesweepers, the successor to Oki Electric Industry's OPS-4. The development was to be carried out by Fujitsu, which was increasing its share of radar for fishing boats at that time. It is also said that British made Type 978 radar technology was introduced. The feature of OPS-9 is that it has a total length of 4 meters, which is unusual for a waveguide slot array antenna. The waveguide slot array antenna has a structure in w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hatsushima-class Minesweeper
The ''Hatsushima'' class is a class of Minesweeper, coastal minesweepers of the Japan Maritime Self-Defense Force. Development The Maritime Self-Defense Force has introduced the mine sweeping capability of the Takami-class minesweeper, ''Takami'' class minesweeper developed in the 3rd Defense Build-up Plan by installing the British ASDIC 193 and the ZQS-2 mine detector that introduced the technology. However, in minesweepers such as the same class, immediately after the introduction of mine sweeping technology, mine disposal depended on the underwater diver, and the danger was great. For this reason, it has become necessary to reduce the risk of mine clearance by using a self-propelled / precursor-type mine disposal tool that is remotely controlled. In response to this, the medium-sized minesweeper in the 4th Defense Build-up Plan was to further improve its sweeping ability, and this type was built by this. Ships in the class Citations [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JS Kurihama
JS ''Kurihama'' (ASE-6101) was an experimental ship of the Japan Maritime Self-Defense Force. Development and design From the above circumstances, special consideration has been given to the torpedo test. The hull is also a long poop deck, and the rear deck is one step lower, making it easier to lift and lower trial torpedoes. On the starboard side of the rear work deck, a deck crane with a capacity of 5 tons is installed for the installation and operation of test equipment. In addition, a measurement room was set up in the adjacent section of the rear deck, and consideration was given to making it easier to monitor the measurement equipment. In addition, an ultrasonic measuring device and a torpedo launcher device were installed on the port side, and measuring equipment could be loaded and unloaded according to the content of the test. However, unlike the successor , the number of people involved in the test was limited to more than a dozen, so there were many day-trip te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atsumi-class Tank Landing Ship
The ''Atsumi''-class landing ship tank is a class of three tank landing ships (LSTs) that served with the Japanese Maritime Self-Defense Force (JMSDF) from 1972 to 2005. They were primarily deployed for logistic support but were also be used to carry heavy construction equipment such as trenchers. Description The three ''Atsumi''-class tank landing ships (LSTs) had a standard displacement of and at full load. They were overall with a beam of and a draft of . Ships in the class were powered by two Kawasaki-MAN V8V 22/30 AMTL diesel engines turning two shafts rated at . This gave them a maximum speed of . Vessels of the class carried two Landing Craft Vehicle Personnel (LCVPs). The LCVPs were slung under davits and a traveling gantry crane with folding rails that could be extended over the side handled the two LCMs positioned on the foredeck. The LSTs could carry up 130 troops. The ''Atsumi'' class were armed with twin-mounted guns in a single turret placed each at the b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enoshima-class Minesweeper
The ''Enoshima'' class is a class of coastal minesweepers of the Japan Maritime Self-Defense Force. Development From the lessons learned from the 1991 dispatch of the Self-Defense Forces to the Persian Gulf, the Maritime Self-Defense Force took the example of the Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...'s ''Sandown'' class minehunter, built after the 1994 plan, especially in order to improve its capabilities regarding mine clearance. . The waters around Japan have many muddy seabeds that are not suitable for minesweeping, and abandonment of minesweeping ability is unacceptable. For this reason, the class is given the ability to sweep with Australian-made -sensitive minesweepers, but due to , it was decided that it would not be installed all the time but w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirashima-class Minesweeper
The ''Hirashima'' class is a class of coastal minesweepers of the Japan Maritime Self-Defense Force. Development From the lessons learned from the 1991 dispatch of the Self-Defense Forces to the Persian Gulf, the Maritime Self-Defense Force took the example of the Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...'s ''Sandown'' class minehunter, built after the 1994 plan, especially in order to improve its capabilities regarding mine clearance. However, while the ''Sandown'' class is basically a minesweeper that does not have minesweeping ability. The waters around Japan have many muddy seabeds that are not suitable for minesweeping, and abandonment of minesweeping ability is unacceptable. For this reason, the class is also given the ability to sweep with Australian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugashima-class Minesweeper
The ''Sugashima'' class is a class of coastal minesweepers of the Japan Maritime Self-Defense Force. Development From the lessons learned from the 1991 dispatch of the Self-Defense Forces to the Persian Gulf, the Maritime Self-Defense Force took the example of the Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...'s ''Sandown'' class minehunter, built after the 1994 plan, especially in order to improve its capabilities regarding mine clearance. However, while the ''Sandown'' class is basically a minesweeper that does not have minesweeping ability. The waters around Japan have many muddy seabeds that are not suitable for minesweeping, and abandonment of minesweeping ability is unacceptable. For this reason, the class is also given the ability to sweep with Australi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uwajima-class Minesweeper
The ''Uwajima'' class is a class of coastal minesweepers of the Japan Maritime Self-Defense Force. Development From the lessons learned from the 1991 dispatch of the Self-Defense Forces to the Persian Gulf, the Maritime Self-Defense Force took the example of the Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...'s ''Sandown'' class minehunter, built after the 1994 plan, especially in order to improve its capabilities regarding mine clearance. However, while the ''Sandown'' class is basically a minesweeper that does not have minesweeping ability. The waters around Japan have many muddy seabeds that are not suitable for minesweeping, and abandonment of minesweeping ability is unacceptable. For this reason, the class is also given the ability to sweep with Australian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JDS Akashi
JDS ''Akashi'' (AGS-5101) was an oceanographic research ship of Japan Maritime Self-Defense Force (JMSDF) in the late 1960s. History In Japan before World War II, the Imperial Japanese Navy Hydrographic Department was engaged in marine surveying and observation missions, but after the war, after the Ministry of Transport, it became a subordinate with the establishment of the Japan Coast Guard. Due to the transition (currently the Marine Information Department), the Maritime Self-Defense Force, which was established after that, did not have a ship specializing in marine surveying and observation missions. However, with the passive warfare of anti-submarine warfare, the collection of marine environmental data is required for efficient execution of maritime operations, and seafloor topography / sediment, tidal currents / geomagnetism, and water temperature / salt content and marine weather, etc. were interrelated and needed to be measured precisely. As for the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Takami-class Minesweeper
The ''Takami'' class is a class of Minesweeper, coastal minesweepers of the Japan Maritime Self-Defense Force. Development The experience of minesweeping during the Korean War has made countries concerned and aware of the threat of Naval mine, submerged mines. In particular, the increasing intelligence of sensitive mine ignition devices and the emergence of target tracking mines will increase the risk of touching mines and the uncertainty of minesweeping in conventional towed rear minesweeping, and one mine will be removed by Bomb disposal, explosive disposal methods. Attention was focused on minesweeping, which was to ensure that one was incapacitated. However, on the other hand, as of the early 1950s, only the earliest mine detectors such as the AN/UQS-1, American AN/UQS-1 were in practical use, and these 100 kHz class sonars were to detect mine-like targets. However, it was not practical to use for mine clearance because it was not possible to distinguish whether it was act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OPS-4 (radar)
OPS-4 is a two-dimensional radar manufactured by Oki Electric Industry. It was installed as surface-search radar on the Maritime Self-Defense Force's self-defense ship. In the Maritime Self-Defense Force, the S-Band SO-8 was operated in the former Navy auxiliary boat that was in operation in the early days, but the Yashima-class minesweeper provided by the United States in the 1958 plan. The boat) was equipped with an X-band AN/SPS-5B. The first mass-produced medium-sized minesweeper to be subsequently maintained was required to continue to be equipped with a domestic radar that operates in the X-band with short wavelengths and high resolution. This model was developed as a result. Overview At that time, the development of the OPS-3 series, which was a domestic version of AN/SPS-5B, was underway, centered on Japan Radio Company (JRC). This was an S-band radar intended to be mounted on escort vessels, etc., but in developing this model, the OPS-6 antenna mount was diverted to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waveguide
A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting the transmission of energy to one direction. Without the physical constraint of a waveguide, wave intensities decrease according to the inverse square law as they expand into three-dimensional space. There are different types of waveguides for different types of waves. The original and most common meaningInstitute of Electrical and Electronics Engineers, “The IEEE standard dictionary of electrical and electronics terms”; 6th ed. New York, N.Y., Institute of Electrical and Electronics Engineers, c1997. IEEE Std 100-1996. d. Standards Coordinating Committee 10, Terms and Definitions; Jane Radatz, (chair)/ref> is a hollow conductive metal pipe used to carry high frequency radio waves, particularly microwaves. Dielectric waveguides are used at higher radio frequencies, and transparent dielectric waveguides and optical fibers serve as waveguides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X Band
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is rather indefinitely set at approximately 7.0–11.2 GHz. In radar engineering, the frequency range is specified by the Institute of Electrical and Electronics Engineers (IEEE) as 8.0–12.0 GHz. The X band is used for radar, satellite communication, and wireless computer networks. Radar X band is used in radar applications including continuous-wave, pulsed, single-polarization, dual-polarization, synthetic aperture radar, and phased arrays. X band radar frequency sub-bands are used in civil, military, and government institutions for weather monitoring, air traffic control, maritime vessel traffic control, defense tracking, and vehicle speed detection for law enforcement. X band is often used in modern radars. The shorter wavelengths of the X band al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
