Sierra class
 ARC Sierra leaving port, 2023
| |
| Class Overview | |
|---|---|
| Builders: |
Arsenale Corric Gilda Varien Shipyards |
| Operators: | Royal Antoran Armada |
| Class before: | Régeñe Natalia Romero class |
| Built range: | 2022 |
| In commission: | Present |
| Ships completed: | 4 |
| Ships active: | 4 |
| General characteristics | |
| Type: | Anti-submarine corvette |
| Displacement: | 1,366 t metric tons |
| Length: | 70.4 m (231 ft 0 in) |
| Beam: | 10.5 metres (34 ft 5 in) |
| Draft: | 2.8 metres (9 ft 2 in) |
| Installed power: |
2 × 400KW GSEB Adamantia diesel generators 1 × 500KW Solaris 108:G gas generator |
| Propulsion: |
CODOG system 2 × Sistemos Armada Ultíma 6kDG-8 8-cylinder diesel engines generating 6,000 hp (4,500 kW) each 1 × Sistemos Armada 36kGTG gas turbines producing 36,000 hp (27,000 kW) each |
| Speed: | 25 kn (46 km/h; 29 mph) |
| Range: | 2,000 nmi (3,700 km; 2,300 mi) |
| Endurance: | 18 days |
| Boats & landing craft carried: | 1 launch |
| Troops: | 10 marines |
| Complement: | 66 crew, 10 officers |
| Sensors and processing systems: |
SVA/G18A+ 3D surface-search and air radar SVA/80-M Electronic Support Surveillance Equipment Luz Libertad SEC-99 Tactical/Topographic Sonar Suite Luz Libertad ETRS-7/C fire-control radar and tactical systems suite |
| Electronic warfare & decoys: |
1 × Lima Alto EWAR system 1 x AQUILA countermeasures/chaff/decoy/active kill launching suites |
| Armament: |
Guns 1 × 100mm HerCan Armas-6/T naval gun 2 × crew served 12.7mm machine guns Missiles 4 x dual tube Ballista-99 tactical missile tubes (Avia DBMO3 anti-ship missiles) or (Avia ABRGO4 surface-to-air missiles) Torpedos 2 x 324 mm triple torpedo tubes (Arma Nautico Modelo 11F1 smart warhead torpedos) |
| Armor: | 1 cm |
| Aircraft carried: | 1 × H-20 Marsopa anti-submarine helicopter |
| Aviation facilities: | Flight deck and Hangar |
The Sierra-class corvettes are corvettes of the Royal Antoran Armada that serve as the main anti-submarine combat and patrol warships, carrying hull code C-S. Their secondary duties include counter-terrorism response and national mercantile escort. The class is made up of four ships, with the first, Arc Sierra, entering service in 2022 after being laid down in 2012. Replacing the aged Régeñe Natalia Romero class, the Sierra class is fully integrated within Antora's Universal Strategic and Tactical Suite battle command system and has been designed by Gilda Varien Shipyards in cooperation with the Arsenale Corric to be modular depending on mission, with a projected service life of over 50 years.
The corvettes were designed from the ground up to integrate within the Armada's doctrine of EEZ defense, navigational denial, and proactive neutralization of threats. Their armament is heavy, boasting a 100mm multipurpose naval cannon that can be configured for direct fire, bombardment, airburst, and zone defense, while the two triple torpedo tubes are concealed behind recessed panels in the bow. These are complimented by four standard dual-tube missile bays. With oversized powerplants for their size, the corvettes can attain a brief flank speed of 25 knots for pursuit of hostile submarines. The class trades these advantages for short deployment time and little range, burning through fuel and supplies quickly and necessitating a patrol pattern close to Antoran territory. In wartime, they are capable of regional deployment for short periods, though practical testing of their capabilities has yet to truly occur.