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{| {{Infobox ship begin }}
{{Infobox Ship Image
|Ship image=File:Project 426.png
|Ship caption=Project 04261 HA-240 (2017)
}}
{{Infobox Ship Class Overview
|Name= ''Project 04260''
|Builders= [[Shipbuilding Plant No.143]]
|Operators= {{flagicon|Itayana}} [[Itayana Navy]]
|Class before=
|Class after=
|Subclasses=
|Cost=
|Built range= 2010 - present
|In service range= 2017 - present
|In commission range=
|Total ships planned= 12-16
|Total ships building= 4
|Total ships completed= 6
|Total ships cancelled=
|Total ships active= 6
|Total ships laid up=
|Total ships lost=
|Total ships retired=
|Total ships preserved=
}}
{{Infobox Ship Characteristics
|Hide header=
|Header caption=
|Ship type= {{wp|Attack submarine}}
|Ship displacement= * 7,000 tonnes surfaced
* 0,900 tonnes submerged
|Ship length=113.67m
|Ship beam=10m
|Ship height=
|Ship draught= 11m
|Ship depth=
|Ship hold depth=
|Ship decks=
|Ship deck clearance=
|Ship ramps=
|Ship ice class=
|Ship power= Diesel-electric, pump jet
|Ship sail plan=
|Ship speed=
* 15kn surfaced (publicly disclosed figure)
* 25kn submerged (publicly disclosed figure)
|Ship range= *'''With snorkel:''' {{convert|12,000|nmi|abbr=on}} at {{convert|12|kn|abbr=on}} (publicly disclosed figure)
|Ship endurance= 120 days
|Ship test depth= 400m (publicly disclosed figure)
|Ship boats=
|Ship capacity=
|Ship troops=
|Ship complement=
|Ship crew= 45 men (21 officer)
|Ship time to activate=
|Ship sensors=
* Surface-Search Radar
* Electronic Warfare Suite
* Optronic mast
* Active Hull Sonar
* 6 x Hull Sonar Flank Array (Passive)
* Towed Array Sonar
* Wake Detection System
* ''White Whale'' Combat Integration and Submarine Management Suite
|Ship Countermeasures =
|Ship armament=
* 4 x 660mm torpedo tubes (16 torpedoes)
* 2 x 324mm torpedo tubes (20 torpedoes)
* 4 x 324mm external launchers (with reloads)
}}
|}


The '''Project 04260''', NATA reporting name: '''Claire''', is a class of long-range diesel-electric attack submarines in service of the [[Itayana Navy]]. It was originally designed in the late 2000s as the bigger of the two domestic submarine designs. The class had a protracted development history, being plagued by financial problems, lack of necessary equipment, and overly ambitious requirements, necessitating outside help to be completed. Nonetheless, six submarines of the initial '''Project 04261''' entered the operational service in the late 2010s. Additional four boats of the related '''Project 04262''' are on sea trials or under construction as of 2022.
==Development==
Unlike most of the [[Itayana Navy]] projects, the '''Project 04260''' has a relatively understood design history coming from the interviews of its lead designers and analysis of the open-source intelligence and media leaks.
The decision to design an ocean-going diesel-electric boat was made by the [[Itayana Navy|Admiralty of Itayana]] in 2002. The design requirements called for a submarine capable of operating in Salacian, Oorupaqi, west Vespanian and wast Makrian oceans in anti-shipping and anti-submarine capacity. The submarine was to be armed and equipped with domestic weapon systems yet to be developed. Diesel-electric propulsion was chosen over atomic as it was estimated that the Itayana economy and industry would not be able to handle a significant force of nuclear submarines. Other limiting factors included the capacity of the slipways and available industrial equipment on the [[Shipbuilding Plant No. 143]], the only facility that can build large ocean-going submarines in Itayana. The design process correlated with the industrial re-armament of the plant, and it was complicated by more and more ambitious requirements regarding armament, sonars, physical signatures, and automation, as well as complications in the development of domestic weapon systems and sensors. It has been reported that engineers from the [[Transoceanic_Co-Prosperity_Sphere#Burning Sun|Burning Sun Initiative]] have aided in the design effort, but so far there is no solid evidence of that.
The design was completed by 2009, receiving the designation '''Project 04261''', and the first two boats were laid down in early 2010. Construction involved expensive and extensive contracts from several countries such as [[Sante Reze]], [[Orun Redisus]], [[Alanahr]], [[Velikoslavia]], [[Elatia]] and [[Zacapican]]. Both boats were launched in 2014, receiving numerical indexes instead of names in line with the established IMF naming conventions. The sea trials of the first pair lasted for three years and were succinctly described as "highly problematic". Both submarines entered service in mid-2017.
In 2021 it was revealed that the fourth pair of submarines were constructed under an improved design, designated '''Project 04262'''. The chief designer stated that the primary goal was to incorporate mature domestic equipment that was originally intended for the first six submarines. She did not reveal whether construction of Project 04261 will be continued should the systems fail to match the expectations.
Available public information suggests that the Navy plans to receive from 12 to 16 of these submarines by 2030.
==Design==
'''Project 04260''' is a family of large ocean-going submarines designed for anti-shipping and anti-submarine operations. Its single-hulled design is optimized for underwater movement. The superstructure acts as a hydrodynamic cover for additional equipment and the sail forms a base for various masts. Notable design features are a smoothly faired transition from the hull superstructure to the sail, and the "X" arrangement of the stern planes, assumed to improve the maneuverability of the large boat. It has a crew of 45, of which 21 are officers, and is designed for the endurance of up to 120 days.
The submarine is powered by diesel-electric transmission and a water jet. While the lack of primary sources on the water jet suggests its domestic origins, available information indicates that different submarines use different engines from several manufacturers from [[Alanahr]] and [[Zacapican]]. Despite the variety, it is stated that all submarines are capable of achieving 15 knots while surfaced and 25 knots while underwater. The safe depth was stated to be within 400 meters.
The submarine's primary armament consists of four 660mm torpedo tubes. The choice of the larger torpedoes was dictated by torpedo design bureaus and justified with a significantly larger warhead, improved physical signatures, and more sophisticated guidance systems. The submarine is also armed with two 324mm internal torpedo tubes and four external 324mm torpedo launchers. Information on either 324mm or 660mm torpedoes of Itayana is sparse at best, but it is stated that the submarine is intended to carry 16 larger and 20 smaller reloads.
The electronic equipment of the submarine is centered around the ''White Whale'' Combat Integration and Submarine Management suite. It is stated to allow high degrees of automation, reducing the need for additional crew. The underwater detection suite consists of a spherical bow sonar, six flank arrays, a towed antenna, two arrays on the sail, and several antennas of the wake detection system. Surface and aerial detection are done using an X-band air search radar and a SIGINT and electronic warfare suite. It is possible that starting from the third pair (HA-278 and HA-182) the spherical sonar was replaced with a conformal antenna of unknown origins.
==Operational history==
In May 2018, HA-240 and HA-375 were observed participating in exercises with the [[Zacapine Navy]] in south Oorupaqi.
In May 2019, HA-240 and HA-434 were stated to participate in exercises with the [[Zacapine Navy]] in south Oorupaqi.
In June 2019, HA-375 and HA-193 were observed in the west Vespanian ocean near Kayatman Sea. During the deployment, HA-193 appeared to have suffered mechanical troubles, causing it to lay adrift for two days with HA-375 escorting it. Both submarines were observed by the navies of the [[Association of Ozeros Nations]].
In March 2020, all four commissioned submarines were observed in the Salacian ocean, participating in a joint exercise with the [[Royal Redisan Navy]]. After the exercises, HA-434 visited Elatia, followed by Mutulese and Belfrasian navies through the Kayamuca Sea.
In May 2021, HA-434 and HA-193 were observed in the eastern Makria ocean, while HA-240 and HA-375 visited the mainland [[Sante Reze]].
In April and May 2022, all six submarines in service made a voyage to the west Vespanian ocean, their mission unknown.
==Variants==
* '''Project 04261.''' Baseline design. 6 boats completed.
* '''Project 04262.''' Improved design. 4 boats under onstruction or on trials. Available information suggests a higher ratio of domestic equipment. Details are unknown.
==Units==
{| class="wikitable sortable"
|+ style="padding-bottom:1em;" | Project 04261
|- class="backgroundcolor5"
!  class="unsortable" width="10%" | Number !! width="20%" | Shipyard !! width="5%" | Project !! width="10%" | Laid down !! width="10%" | Launched !! class="unsortable" width="10%" | Commissioned!! class="unsortable" width="20%" | Status
|-
|{{flagicon|Itayana}} HA-240||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 01.02.2010|| style="text-align:right" | 05.03.2014|| style="text-align:right" | 11.06.2017|| Active
|-
|{{flagicon|Itayana}} HA-375||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 01.02.2010|| style="text-align:right" | 05.03.2014|| style="text-align:right" | 11.06.2017|| Active
|-
|{{flagicon|Itayana}} HA-434||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 06.03.2014|| style="text-align:right" | 15.06.2017|| style="text-align:right" | 21.03.2019|| Active
|-
|{{flagicon|Itayana}} HA-193||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 06.03.2014|| style="text-align:right" | 15.06.2017|| style="text-align:right" | 21.03.2019|| Active
|-
|{{flagicon|Itayana}} HA-278||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 16.06.2017|| style="text-align:right" | 11.11.2019|| style="text-align:right" | 04.06.2021|| Active
|-
|{{flagicon|Itayana}} HA-182||[[Shipbuilding Plant No.143]]||04261
|style="text-align:right" | 16.06.2017|| style="text-align:right" | 11.11.2019|| style="text-align:right" | 04.06.2021|| Active
|}
{| class="wikitable sortable"
|+ style="padding-bottom:1em;" | Project 04262
|- class="backgroundcolor5"
!  class="unsortable" width="10%" | Number !! width="20%" | Shipyard !! width="5%" | Project !! width="10%" | Laid down !! width="10%" | Launched !! class="unsortable" width="10%" | Commissioned!! class="unsortable" width="20%" | Status
|-
|{{flagicon|Itayana}} HA-403||[[Shipbuilding Plant No.143]]||04262
|style="text-align:right" | 12.11.2019|| style="text-align:right" | 04.04.2021|| style="text-align:right" | N/A|| Undergoing sea trials
|-
|{{flagicon|Itayana}} HA-387||[[Shipbuilding Plant No.143]]||04262
|style="text-align:right" | 12.11.2019|| style="text-align:right" | 04.04.2021|| style="text-align:right" | N/A|| Undergoing sea trials
|-
|{{flagicon|Itayana}} HA-???||[[Shipbuilding Plant No.143]]||04262
|style="text-align:right" | 05.04.2021|| style="text-align:right" | N/A|| style="text-align:right" | N/A|| Under construction
|-
|{{flagicon|Itayana}} HA-???||[[Shipbuilding Plant No.143]]||04262
|style="text-align:right" | 05.04.2021|| style="text-align:right" | N/A|| style="text-align:right" | N/A|| Under construction
|}
==Operators==
* {{flagicon|Itayana}} [[Itayana Navy]] ─ 6 units + 4 under construction

Revision as of 13:40, 1 January 2023

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