The Legend-class patrol ship, the flagship of the US Coast Guard, was used as a replacement for the Hamilton-class patrol ships that were commissioned in the 60s of the last century. The patrol ship was built by Ingals and was primarily responsible for the design and construction of the hull and mechanical and electronic systems, while Lockheed Martin produced and integrated the ship's C4ISR system.
As the most advanced vessel of the U.S. Coast Guard, the Legend class patrol ships are equipped with a variety of advanced equipment and systems that enable them to perform tasks such as maritime security, environmental protection, and national defense. These tasks include protecting U.S. maritime interests, enforcing maritime regulations, and providing assistance and support in emergency situations.
The U.S. Coast Guard plans to build eight Legendary*** cruisers, each with state-of-the-art technology and design to ensure it can perform its mission in a variety of environments and conditions. The design and construction of these ships also fully reflects the importance and commitment of the United States to maritime security. As the flagship of the U.S. Coast Guard, the Legend-class patrol ships represent the strength and status of the United States in the maritime domain.
Performance parameters of the Legend-class patrol ships:
Establishment: 99 people.
Ship length: 126 meters.
Full load displacement: 4,488 tons.
Speed: 28 knots.
Self-sustaining: 60 days.
* Armed with 1 MKLL0 single-barreled 57 mm gun and 1 MK15 "Phalanx" gun.
The Legend-class patrol ship, this giant on the sea, has a displacement of more than 4,500 tons, which is almost the same as China's 054-class frigates. Among patrol ships, this is undoubtedly a behemoth. Its hull uses a large number of new composite materials, the use of which not only reduces the weight of the hull, reduces fuel consumption during navigation, but also enhances the speed of the ship while reducing the cost of use.
The legendary powertrain is powerful. It is equipped with an LM-2500 gas turbine with a single power of up to 22 MW, and two MTU 20V 1163 diesel engines, each with a power of 7,400 kW. This diesel-fired alternating combined power system enables the Legend to reach a top speed of more than 28 knots. This speed is close to the speed of a naval warship. Surprisingly, the Legend Class only needs one of the two engines to work properly to maintain a normal ride. If only a single diesel engine is used, the ship can even reach a speed of 18 knots.
As a patrol ship, the Legend class not only has excellent acceleration ability, but also has a strong endurance. It can reach a range of 12000 nautical miles. Although this range is shorter than the 14,000 nautical miles of the Hamilton class, it is completely sufficient considering that the many bases of the US military can be replenished at any time.
As a patrol ship, its main task must be to search the sea. However, this patrol ship is not satisfied with this, it is equipped with a variety of radar systems, making it more comprehensive and efficient in the execution of its tasks.
First of all, the ship is equipped with an AN SPQ-9B fire control radar, which is an X-band pulsed Doppler radar developed by Westinghouse on the basis of the SPQ-9(A). This radar has three working conditions: air-to-air, sea-to-sea, and beacon response, and in addition to providing target irradiation for naval guns, it can also detect low-altitude incoming targets. On the sea surface, it can detect distant targets, provide early warning and defense for the fleet; In the airspace, it can track and lock on to targets, providing precision guidance for shipborne **.
In addition, the ship is equipped with an SPS-73 sea-to-sea search navigation radar and a TRS-3D 16D air-to-sea search radar. These radar systems provide a full range of detection and tracking capabilities, both for surface and air targets. They can not only provide navigation and positioning services for the fleet, but also detect hidden targets in complex water areas, increasing the safety and reliability of patrol ships when performing tasks.
To sum up, this patrol ship is equipped with a variety of advanced radar systems, which makes it have excellent performance in sea search, airspace monitoring, navigation and positioning, etc. The combined use of these radar systems not only improves the combat capability of the ship, but also provides strong support for the coordination and command of the entire fleet.
The TRS-3D 16 radar on board this Legend-class patrol ship is like an eagle's eye to monitor and detect air-to-sea targets. The C-band 3D multifunction radar, developed and produced by EADS North America, demonstrates its capabilities through an array of 16 emitters of 46 transmitters.
The TRS-3D radar system can carry out phase scanning in the vertical direction, mechanical scanning in the horizontal direction, and is mainly used to automatically perform the detection and tracking of sea targets and medium-range airborne targets. It has excellent immunity to interference and the ability to perform tasks in bad weather, and can automatically select the frequency band with the least interference. In monitoring mode, 10 revolutions per minute, the effective detection distance reaches 100 kilometers.
In long-range mode, the detection range can be reached up to 180 km using the channel effect. In self-defense mode, by superimposing long-range and close-range modes, it is possible to effectively detect sea-skimming targets at a distance of about 45 km, and in this mode it is 30 revolutions per minute. The ultra-long detection range and high-frequency information update capability provide the ship with strong sea surface surveillance capabilities, and the radar also has outstanding performance in near-shore and coastal environments.
Therefore, the TRS-3D 16 radar is widely used in the LCS-1 series of littoral combat ships, K-130 corvettes, and Finnish "Hamina" missile boats. In addition, the TRS-3D 32 of the series was used on the F-122"Bremen"The modernization of the class frigate is also expected to adopt this type of radar. The U.S. military gave this type of radar the AN-SPS-75 designation in recognition of its excellent performance and wide range of applications.
As a type of official patrol ship, the "Legend" class is even equipped with the AN SLQ-32 (V3) electronic warfare system that is exactly the same as the active combat ships of the US Navy, which can be integrated into the US Navy's command system at any time, which also provides technical support for the Wartime Legend-class patrol ships to join the Navy.
The SLQ-32 electronic warfare system is used to assess the electromagnetic environment, identify radar-guided threats, activate electronic countermeasures, and provide alerts and target designation to operators and combat systems, but its main function is to defend against anti-ship missile attacks and to assume point defense tasks on ships. Therefore, it has the characteristics of high probability of interception and short total reaction time. The system adopts a combination of crystal** receiving direction finding and instantaneous frequency measurement. It uses a dielectric lens fed multi-beam antenna array, the array used for receiving has a total of 16 beams, each array for transmission has 35 elements, a total of 140 50W power traveling wave tubes, the synthetic pulse power of the entire antenna radiation can reach 1MW, and 80 threat radars can be simultaneously carried out in the IJ band or responder jamming, with extremely strong electronic warfare capabilities. The jammer consists of eight high-voltage power supplies for traveling wave tubes, a transponder jammer, a digital switching device and an interference waveform generator. In order to reduce the impact of ship shaking on the work of the equipment, the antenna device of the V3 adopts a hydraulic two-axis shock absorption system.
The system adopts UYK-19 computer control system with strong adaptability. Both azimuth and frequency measurements are wide open with a frequency range of 1 18 GHz. The system intercepts the signal in a time of only 51ns. According to public information, the system has a 100 probability of interception for general radar, agile frequency radar and random scanning radar, and can accurately measure frequency direction finding for each signal. While continuously jamming radars, it can also alert and monitor other radars. The (V3) version adopted in the "Legend" class weighs 1199 kg.
The system has extremely strong electronic warfare capabilities, can jam 80 threat radars at the same time, and is characterized by a high probability of interception and a short total reaction time. In the case of the ship shaking, the antenna device of the V3 adopts a hydraulic two-axis shock absorption system, which ensures the stable operation of the equipment. At the same time, the system can also alert and monitor other radars, making the "Legend" class extremely capable of responding to complex sea and air environments.
As an important tool for maritime patrol and surveillance, patrol ships play a vital role. In the stern of this kind of ship, it can be put into 2 hard inflatable boats, which further enhances its flexibility and combat capability. The hard inflatable boat has the advantages of fast speed, strong maneuverability and large load, which can effectively ensure the smooth progress of maritime patrol and surveillance tasks.
In addition to hard-bodied inflatable boats, manned and unmanned rotary-wing aircraft can be parked on the flight deck of patrol ships. These aircraft can conduct close reconnaissance of targets and provide accurate intelligence information. This design not only enhances the reconnaissance capability of the patrol ship, but also provides great convenience for maritime patrol and surveillance. In this way, patrol ships can quickly respond to and deal with various maritime emergencies, effectively safeguarding the country's maritime rights and interests.
In the field of maritime patrol and surveillance, unmanned rotary-wing aircraft have become a trend. These aircraft have the advantages of high precision, high stability, high security, etc., and can perform a variety of tasks, such as target reconnaissance, situational awareness, fire warning, etc. Manned rotary-wing aircraft offer a more flexible and personalized solution, customizing equipment and operations to the needs of the mission.
In short, the launch of patrol ships and the design of hard-body inflatable boats, as well as the parking of manned and unmanned rotary-wing aircraft, provide great convenience for maritime patrol and surveillance. These advanced equipment and equipment not only enhance the combat capability of patrol ships, but also provide a strong guarantee for maritime security.