Project 17100

Class overview
Name:	Project 17100 destroyer
Operators:	Itayana Navy
Preceded by:	Project 14460 destroyer
In service:	2002-present
Completed:	7
Active:	7
General characteristics
Type:	Guided-missile destroyer
Displacement:	Design: 16,800 t (16,500 long tons; 18,500 short tons) Full load: 19,800 t (19,500 long tons; 21,800 short tons)
Length:	203.5 m (668 ft) (o/a) 197.5 m (648 ft) (w/l)
Beam:	21.3 m (70 ft)
Draught:	7.8 m (26 ft)
Installed power:	8 x 27,500 kW (36,900 bhp) gas turbines (17101/2) 8 x 32,000 kW (43,000 bhp) gas turbines (17103/4)
Propulsion:	4 sets of turbo-electric transmission 4 shafts with controlled-pitch propellers
Speed:	+32kn
Range:	+11,000 nautical miles (20,000 km) at 18 knots
Boats & landing craft carried:	4 Type 601 cutters
Complement:	363 (17101)
Sensors and processing systems:	Long-range air scan radar 3D air search radar 4 SAM guidance radars 4 fire control radars 2 navigation radars Optronic suite Sonar suite: Hull-mounted sonar Retractable sonar Towed sonar array
Armament:	160 SAM VLS cells Main battery: 2x2 135mm guns (Aribango only) 2x2 155mm guns 1x1 240mm gun (Asima only) Anti-air battery: 8x2 76mm guns (17101/2) 8x1 100mm guns (17103/4) Close-in weapon systems 8-12 25mm rotary canons Skyreach high-energy CIWS (Asima only) 4x4 324mm torpedo tubes (32 reloads)
Armour:	Various local protection
Aircraft carried:	4 helicopters 8 helicopters (Asima)

The Project 17100 destroyer, sometimes known as Aribango-class destroyer is a family of guided-missile destroyers (DDGs) in service of the Unifying Navy. The class was conceived in late 1980s as the primary capital ship of the resurgent Navy, capable of conducting anti-aircraft warfare, anti-submarine operations, anti-surface combat in sustained actions, ground-strike missions, and long-range surface raiding operations. Design effort included study of Zacapine, Rezese, Redisan, and Elatian capital ships and their surface actions, and involved technical assistance from the Oxidentali nations.

All ships of the class are named after the cities in the Two Basins, including both the Autocracy and Amayana Makgato Federation cities. The lead ship, Aribango, was built in Gallentica Naval Works shipyard in Orun Redisus, while all other ships were built on the Shipbuilding Plant No.113 in the Imo Basin. Seven have been completed by 2024, replacing the older Project 14460 destroyers in service.

Development

The Unifying Revival, spearheaded by the Solar Temple of Yanbango in the lower Karana basin, was characterized, among other things, by intense, lengthy, and often heated discussions in the internal periodic papers of the Temple Missions in various countries. The recurring theme was the composition of the future navy of the Temple State, with discussions involving priests, apprentices, a few students training in various military academies, and occasional invited experts from the navy of the country the particular mission was situated. Most vocal proponents in the Elatian and Zacapine missions eventually took the upper hand, while debating between themselves about the composition of their desired fleet. By the time the Itayana Navy was re-established in 1988, the priesthood and the Captains' Council of the Navy were unified in that the blue-water navy would need three types of combat ships: an aircraft carrier as a C3I, air defence, and strike ship; a frigate as the main multi-role ship of the fleet; and a capital ship.

The desired frigate formalized as the Project 15470 program, and its design process, based entirely around proven and tested systems, met the least difficulties between the three. The carrier program, while initially considered economically impractical, unexpectedly materialized with the help of the Burning Sun initiative in 1996 as the Project 11431, a reconstruction of an unfinished Elatian aircraft cruiser. Clauses of the Burning Sun funding included provisions to test certain systems to be employed in the Zacapine Navy, a decision that led to numerous problems in ship's sea trials. The capital ship program materialized as the Project 17100.

Requirements for a future capital ship of the Navy were debated and discussed through late '60s, '70s, and '80s. Said debates involved extensive analysis of the Belfro-Mutulese War of 1928, Second Belfro-Elatian War, and Third Uhlangan Civil War, as well as the present state and development of capital ships around the world from various sources the priests have evoked. Proponents of the surface raiding doctrine, centered around the mission in Elatia, argued that Itayana would never be able to establish a fleet that could oppose numerically superior fleets in open combat, meaning the possibility of raiding hit-and-run tactics was the way to deter possible naval aggression. They carefully studied the Second Belfro-Elatian War and surface actions of the Elatian Navy in it. Their opponents, centered around the mission in Zacapican, argued that Elatian raiding doctrine based around submarines and surface raiders, ultimately failed through a series of engagements where outgunned solitary raiders were destroyed one by one, and that a few surface raiders complemented with submarines would ultimately prove more expensive than a balanced, if weaker, surface fleet. Their point of view was to develop a well-rounded capital ship for open missile combat, in line with developments in the Zacapine Navy after the 3rd Uhlangan Civil War. The discussion fluctuated between doctrinal matters, naval operations studies, and technical studies for over 15 years, and became a notorious point of contention within the Temple ranks.

The final design requirements represented a consensus between the opposing factions. They were made possible by advancements in the propulsion systems, radar and helicopter technology, and introduction of vertical launch systems on the Zacapine destroyers in 1980s. In 1988, with the re-establishment of the Itayana Navy, a set of requirements was made demanding a capital ship that could conduct both the surface raiding operations and the sustained missile combat in the fashion of the evolved battle line tactics, fusing the two points of view. Details on the design process are sparse; it is known that several heavy cruiser and battlecruiser designs from 1920s to 1950s were used as technical templates, as well as several contemporary guided-missile capital ships. The final design resembled Elatian heavy raiders mixed with Zacapine guided missile air defence nuclear-powered destroyers.

The lead ship was ordered to the Gallentica Naval Works, the same yard that constructed the first batch of Project 15470 frigates, and under the same 1995 contract. Further ships were built in an expanded Shipbuilding Plant No.113, where three slipways were constructed in late 1990s to accommodate the localized orders.

General characteristics

Built over several decades and to several design iterations, Project 17100 ships vary slightly in dimensions. The lead ship, Aribango, is 197.5 m (648 ft) long at the waterline and 203.5 m (668 ft) overall, with the beam of 21.3 m (70 ft). The first batch (Shenmesu, Airashe and Laodan) are 199.5 m (655 ft) long at the waterline and 206 m (676 ft) long overall, with the beam of 22 m (72 ft). Kanokari and Yanomi are both 201.2 m (660 ft) long at the waterline and 210 m (689 ft) overall, with the beam of 21.7 m (71 ft). Finally, Asima is 201.4 m (661 ft) long at the waterline and 211 m (692 ft) overall, with the beam of 22.2 m (73 ft). It is known that all ships displace at around 16,800 t (16,500 long tons; 18,500 short tons) designed, while the full load is estimated to be around 19,500 t (19,200 long tons; 21,500 short tons).

The ships layout is characterized by high freeboard and extensive superstructure flanked by anti-air artillery emplacements, resembling heavy cruiser and battleship designs from the 1940s. The superstructure includes three tower masts with radar equipment, a bridge inspired by Elatian designs, and a large helicopter hangar to the rear. Asima, Kanokari, Yanomi had their bridge structure redesigned into a stealthier Zacapine-inspired pattern; the former additionally has more extensive hangar facilities at the stern, lacking the rear turret. It is known that the ships' complement is 363 for the lead ship, same figure is assumed for the first batch. It was claimed that Kanokari and Yanomi had their complement reduced down to 180 through extensive automation, which seems unlikely. The complement of Asima is assumed to be around 250-270 due to the extended air group, but no official figures have been published as of 2024.

All ships are powered by eight gas turbines working through turbo-electric propulsion. The turbines are of the Zacapine origins, licensed by the Autocracy; the first four ships have 27,500 kW (36,900 bhp) output turbines, while the latter three have a stronger, 32,000 kW (43,000 bhp) output turbines. Four sets of turbo-electric transmission generate the majority of the power for the ships' equipment while eliminating combination gearboxes, a notable roadblock for the industry of the Autocracy. Each set drives a controlled-pitch screw about 4.2 m (14 ft) meters in diameter. The top speed varies between the members and exact figures are unknown, only that they exceed 32 knots. The range is estimated to exceed 11,000 nmi (20,000 km), as deduced from various overseas deployments. On all ships of the class, steering is controlled by two rudders, with an auxiliary drive for low-speed manoeuvring.

The ships primary armament is formed from a combination of vertical launch cells, heavy artillery, and light dual-purpose artillery. All ships carry 160 VLS cells in two blocks of 80, for both the surface strike and anti-air missiles. The missile types used in the cells appear to be common for the Autocracy, derived from various designs in the Western Hemisphere. For the main artillery battery, Aribango has two twin turrets with 135mm guns, licensed from Sante Reze, a standard weapon capable of engaging air and surface targets. From Shenmesu onward, those were replaced with twin 155mm mounts, more capable against surface and land targets. Although it is known that an anti-air round was developed for the gun, the rate of fire for 155mm is insufficient to make it useful as a dual-purpose gun.

The secondary battery is formed from various dual-purpose guns. First four ships have eight twin-gun mounts with 76mm guns, licensed from Sante Reze, while the latter three ships switch those to single 100mm guns. All ships also have 25mm rotary gun mounts to engage small slow-moving targets like drones, boats or USVs, but their amount and positioning vary from ship to ship. The ships also have four quad 324mm torpedo launchers with two reloads per each tube. Four helicopters can be carried in a rear hangar, with a possible disassembled spare one.

Asima was completed as a test bed for various technologies, and thus differs in layout and armament. For the main artillery, she mounts a single 240mm gun in place of the forward twin turret. The mount is known to be automated, firing specialized guided shells; its overall characteristics and performance are unknown. In addition to the standard secondary battery of the second batch (8x1 100mm DP guns), she also mounts a prototype high-energy CIWS, unofficially code-named Skyreach by the analysts. The weapon represents an effort by the Burning Sun and the Solar Temple to develop a naval laser system, but its efficiency is also unknown. Her hangar was extended deep into the hull structure, allowing her to carry up to eight helicopters. Finally, the ship also has a small docking bay at the rear, useful for launching boats and unmanned surface vehicles. The bay is known to be connected to the hangar, allowing somewhat simpler underway replenishment as well.

Electronic equipment varies extensively between ships of the class. Generally, all ships have a long-range air scan radar, a set of 3D air scan radars, a set of missile targeting radars, a set of artillery fire control radars, an ELINT/EW suite of various antennas and arrays, various auxiliary radars, and an extensive set of communication systems. The first four ships mounted largely the same equipment as Project 15470 frigates, with two 3D air scan radars and four missile guidance radars, derived from the O6Y Tletechiuh radar, common for the Zacapine Navy. The latter three mount a 3D S-band air scan AESA phased array radar identical to the system on the Project 11431 aircraft carrier. Pairs of arrays are distributed in over the fore and the aft radar masts to ensure the ship would remain operational in case of a breakdown or combat damage. Missile control was redistributed into several X-band targeting arrays, while new multi-purpose launchers were installed instead of the standard decoy launchers. Those launchers, tested on Shenmesu during her sea trials 2012, serve to fire rocket bombs, decoys, and small anti-air and anti-surface missiles, allowing them to engage multiple targets.

For the anti-submarine warfare, all ships mount a standard sonar suite, with a bow sonar, a retractable under-keel sonar, and a towed array. Those systems are understood to be the standard across the Navy.

Role and notable deployments

Project 17100 ships are usually employed as flagships of frigate formations or on solitary foreign visits, representing the height of the Solar Autocracy naval engineering and industrial prowess. They are usually seen on numerous exercises with the major powers of Oxidentale or Elatia, the latter of which they can reach with minimal logistical support. All ships of the class were at one moment of their career present on foreign visits, with Aribango sighted on 11 of them as of 2024. Despite that, no more than two or three are usually seen operational at sea per year, due to the logistical cost of their deployment, and the commissioned ships are yet to be seen in one event all together.

Ships in class

Project 17100 destroyers

Name	Namesake	Subclass	Shipyard	Laid down	Launched	Commissioned	Status
Aribango	City of Aribango, lower Karana basin	17101	Gallentica Naval Works	10.01.1996	10.02.2000	22.04.2004	Active
Shenmesu	City of Shenmesu, lower Karana basin	17102	Shipbuilding Plant No.113	05.04.2001	07.03.2009	18.08.2013	Active
Airashe	City of Airashe, Makgato plateau	17102	Shipbuilding Plant No.113	05.04.2001	08.03.2009	25.08.2013	Active
Laodan	City of Laodan, lower Imo basin	17102	Shipbuilding Plant No.113	05.04.2001	09.03.2009	31.08.2013	Active
Kanokari	City of Kanokari, Karana-Imo Mesopotamia	17103	Shipbuilding Plant No.113	11.03.2009	10.07.2017	30.04.2020	Active
Asima	City of Asima, Karana-Imo Mesopotamia	17104	Shipbuilding Plant No.113	11.03.2009	11.07.2017	16.05.2020	Active
Yanomi	City of Yanomi, Makgato plateau	17103	Shipbuilding Plant No.113	11.03.2009	12.07.2017	09.05.2020	Active