The Western Isles

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The Serzia-class Patrol Vessel is a class of mid-sized patrol vessels designed to replace the obsolete Cubral-class Patrol Vessel. First conceived in the mid-1990s, the ship was primarily designed for high-speed operations. However, it has also been regularly utilized for patrolling, fisheries protection, anti-poaching, counter-insurgency, and search-and-rescue operations within coastal areas and the exclusive economic zone. Originally, the Baumish Navy had ordered 14 units to be made, however budgetary constraints and a stronger interest in other naval projects resulted in only 9 units being produced for the navy, with another additional ship being made later in 2009.

Outside Baumes, the ships have also proved to be a favorable choice. Its rather simple design meant that the vessels would be significantly simpler and more affordable to build, procure, and maintain compared to other similar designs. Furthermore, its design could be easily modified to tailor more specific needs, with the ship having been developed into several more specific subvariants such as an autocannon variant and a missile boat variant. Other variants include a Warfburgian variant with Warfburgian radars and computers and a proposed anti-submarine warfare variant.

As of current, a total of 20 of ships have been made, of which 18 remain in active service with 5 navies. The largest operators of the Serzia-class are the Warfburgian Navy with 10 ships, the Baumish and Kaskalman Navy with 3 units respectively, and the Musani Navy and Townsider Navy operating 1 vessel each, both of whom were donated by the Baumish Navy. The ships are expected to be replaced by the Revador-class in Baumes and Warfburg.

Design

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Base Variant
The most widely produced variant, the base variant of the Serzia-class with a typical armament consisting of solely a single 30 mm close-in-weapon system with a dual feed mechanism that allows it to toggle between armor-piercing tracer and high explosive incendiary & fragmentation tracer projectile. A pair of 12.7 mm heavy machine guns may optionally be fitted as well if requested. It is equipped with a navigation radar and a surface search radar which can be found as standard equipment on all ships and variants in the Serzia-class.

The variant is comprised of three production blocks, the first of which being Block A which was produced between 2002-2008. Block B was made until 2018 and consisted of major upgrades to its navigation radar and a newer version of the surface search radar, allowing it to track more ships from a further range. Block C was a more minor upgrade which has been built since 2018 in response to the delays in the second batch of Baumes' Revador-class. Baumes completely phased out the variant for the Revador-class in 2022.

The variant still remains in service with Musani and Townsider navies, both of whom had been donated a used vessel by the Baumish Navy in 2022 and 2023 respectively. PZK Ehrgeiz of the Kaskalman Permian Revenue Service underwent a conversion into a cannon-equipped ship in 2020. Prior to that, it had been operated by the Baumish Navy as RBS Jarato until its subsequent decommission and sale to Kaskalma in 2019. Warfburg also continues to operate 10 units of the base variant, although it is more typically separated into its own variant due to its significant technical differences.

Warfburgian Variant
In 2007, Baumes and Warfburg reached an agreement for the Warfburgian Navy to purchase 10 units of the base variant, making it the first international order for the ship. It was to be equipped with Warfburgian-made radars and computers. However, they chose to retain the Baumish armament and weapon systems. The first ship was officially commissioned into naval service in 2009, and the orders were all completed by 2013. They underwent a block upgrade in 2019 with a refitted navigational radar. All ships continue to remain in active service with the navy.

Cannon Variant
The initial Baumish order for 10 ships consisted of a request for 5 of them to be fitted with an additional autocannon for better survivability and practicality in combat environments. In response, a 76 mm autocannon was equipped and the hull was strengthened for the variant. A stronger derivative of the surface search radar was utilized, allowing for a further detection range able to track more ships. 3 examples of this variant remains in the Baumish Navy due to delays, however, it is expected to be fully replaced by the Revador-class by 2027. 3 units remain in service with the Kaskalman Permian Revenue Service.

One of the ships built, RBS Pinazeiro, was later fitted with an air and surface search radar in 2009. The Baumish Navy had been planning on fitting the radar on all its Serzia-class ships and wanted to experiment it first. It also came with a pair of MANPADS surface-to-air missiles. However, the radar was removed later on citing high maintenance costs and its impracticality for usage in a patrol boat and it was never utilised again. It still remains as an optional system that can be fitted into the cannon variant along with MANPADS if requested.

Missile Variant
In 2001, the Baumish Navy issued a mandate for a replacement to its Costavozkan-built Project-73 Heavy Coastal Missile Boat. A derivative of the base Serzia-class design was fitted with a pair of missile launchers capable of carrying a total of 6 surface-to-surface or anti-ship missiles along with a fire control radar. In the end, the navy ended up favoring the Project-73 based Anador-class design as it was deemed a more practical and effective design. However, [ADD NAVY] later ended up buying [ADD NUMBER] of the missile variants in [ADD YEAR].

Being the largest variant available, it is more often referred to as a missile boat or a fast attack craft. It is equipped with an advanced missile launching system and MANPADS missiles while the hull is also strengthened to improve its endurance. To accommodate for its heavier weight, a more powerful engine was used along with a modern air and surface search radar capable of detecting ships and aircraft from further ranges compared to other similar ships in its class. It is also slightly more affordable to its rival, the Anador-class, by about $2 million IAD.

Ships

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Operator	Name	Commissioned	Decommissioned	Homeport	Status	Notes
Baumish Navy	RBS Serzia	21 August 2002	6 March 2022	Guanderosa	Retired	Lead ship, base variant. Decommissioned and donated to the Musani Navy in 2022.
Baumish Navy	RBS Pinazeiro	3 January 2003	31 August 2021	Roquez	Retired	Base variant. Decommissioned and scrapped in 2021.
Baumish Navy	RBS Jarato	26 September 2003	4 July 2018	Garem	Retired	Base variant. Decommissioned and sold to the Permian Revenue Service in 2019. Converted into cannon variant and is currently PZK Ehrgeiz with the Permian Revenue Service.
Baumish Navy	RBS Colonau	15 December 2003		Garem	Active	Cannon variant.
Baumish Navy	RBS Tohoca	10 June 2004	19 October 2017	Roquez	Retired	Cannon variant. Decommissioned and sold to the Permian Revenue Service in 2019. Currently PZK Mirsdorf with the Permian Revenue Service.
Baumish Navy	RBS Suzano	8 October 2004	25 January 2022	Cavilas	Retired	Base variant. Decommissioned and donated to the Townsider Navy in 2024. Currently HMTS Ranger with the Townsider Navy.
Baumish Navy	RBS Barbana	22 March 2005	6 August 2018	Guanderosa	Retired	Cannon variant. Decommissioned and sold to the Permian Revenue Service in 2019. Currently PZK Sicherheit with the Permian Revenue Service.
Baumish Navy	RBS Kayatlin	11 August 2005	22 July 2018	Santiara	Retired	Base variant. Decommissioned and scrapped in 2018.
Baumish Navy	RBS Paravel	28 February 2006		Cavilas	Active	Cannon variant.
Warfburgian Navy	WNS P-43	17 August 2009			Active	Warfburgian variant.
Baumish Navy	RBS Zuquitin	12 November 2009		Garem	Active	Cannon variant.
Warfburgian Navy	WNS P-44	4 May 2010			Active	Warfburgian variant.
Warfburgian Navy	WNS P-45	26 September 2010			Active	Warfburgian variant.
Warfburgian Navy	WNS P-46	11 March 2011			Active	Warfburgian variant.
Warfburgian Navy	WNS P-47	2 August 2011			Active	Warfburgian variant.
Warfburgian Navy	WNS P-48	24 January 2012			Active	Warfburgian variant.
Warfburgian Navy	WNS P-49	7 July 2012			Active	Warfburgian variant.
Warfburgian Navy	WNS P-50	30 December 2012			Active	Warfburgian variant.
Warfburgian Navy	WNS P-51	24 May 2013			Active	Warfburgian variant.
Warfburgian Navy	WNS P-52	17 October 2013			Active	Warfburgian variant.
Permian Revenue Service	PZK Mirsdorf	20 May 2019			Active	Cannon variant. Formerly RBS Tohoca of the Baumish Navy.
Permian Revenue Service	PZK Sicherheit	14 August 2019			Active	Cannon variant. Formerly RBS Barbana of the Baumish Navy.
Permian Revenue Service	PZK Ehrgeiz	27 December 2019			Active	Cannon variant. Formerly RBS Jarato of the Baumish Navy.
Musani Navy	MNS Molupez	2 September 2022			Active	Base variant. Formerly RBS Serzia of the Baumish Navy.