Sirio-class patrol vessel

The Sirio class of patrol vessels consists of two units operated by the Italian Navy named Costellazioni II series or Nuove Unità di Pattugliamento d'Altura (NUPA). These vessels were financed by the Italian Department of Transport and Navigation, under law 413/1998, for maritime economic zone surveillance, antipollution, and rescue operations.

Orione (P 410)
Class overview
NameSirio class
BuildersFincantieri, Riva Trigoso and Muggiano (La Spezia)
Operators Italian Navy
Cost
  • €150 million (2000) for 2 units
  • €75 million (2000) per unit
In commission2002
Completed2
Active2
General characteristics
TypePatrol vessel
Displacement1,548.6 t (1,524.1 long tons) full load[1]
Length
  • 88.6 m (290 ft 8 in) LOA[2]
  • 80.0 m (262 ft 6 in) LPP
Beam12.2 m (40 ft 0 in)
Draught
  • 3.84 m (12 ft 7 in)
  • depth 8.2 m (26 ft 11 in)
Propulsion
  • - 2 shaft and 2 variable-pitch propellers
  • - 2 x rudders
  • - 2 x active-fin stabilizers
  • - 2 x Wärtsilä-NSD W12-V-26 XN diesel engines (4,320 kW (5,790 hp) each)
  • - 3 x Isotta Fraschini V1708 T2 M2 diesel generators (600 kW (800 hp) each)
Speed22 knots (41 km/h; 25 mph)
Range3,300 nmi (6,100 km; 3,800 mi) at 17 knots (31 km/h; 20 mph)
Complement72
Sensors and
processing systems
  • 1 × Selex ES RAN-30X/I (RASS) - MM/SPS-791 - multi-mode radar operating at X band, search radar with over-the-horizon (OTH) detection mode
  • 2 × navigation radar GEM Elettronica SPN-753 (since 2012, GEM Elettronica Gemini-DB, X/Ku dual band radar)
  • since 2012, Selex ES JANUS-N IRST system
  • Selex ES CMS
  • Elmer Integrated Communication System
  • since 2012, Leonardo-Finmeccanica TDL M-DLP link 11/16/22
Armament2 × OTO Melara 25/80 guns with Oerlikon KBA 25mm. Predisposizione per 1 cannone Oto Melara 76/62 super rapido a prua
Aviation facilitiesflight deck for an NH-90 helicopter
Notes2 × RHIB

Description

The construction of these units is based largely on that of the Nuove Unità Minori Combattenti (NUMC); the hull and superstructure incorporate stealth features. The NUMC and Nuove Unità di Pattugliamento d'Altura (NUPA) share logistics, interoperability, features of the combat system and integrated telecommunications systems.

Each unit has two Wärtsilä NSD- W12-26 V-XN diesel engines providing 8,640 kW (11,590 hp) to two variable-pitch propellers. The ships have a top speed of 23 knots (43 km/h; 26 mph) and a range of 3,300 nautical miles (6,100 km; 3,800 mi) at 14 knots (26 km/h; 16 mph). Three Isotta Fraschini 1708 T2 M2 600 kW (800 hp) diesel generators each power the on-board electronics.

The armament consists of two Oerlikon KBA-Alenia Oto Melara 25 mm (0.98 in)/80 guns with the provision to bow mount an OTO Melara 76 mm (3.0 in)/62 Super Rapid gun. Each unit can embark a single helicopter, either an AB-212 ASW or SH-90A NFH, but the ships lack hangars. For antipollution roles, vessels are fitted with: skimmers, 330 m3 (87,000 US gal; 73,000 imp gal) of recovered oils tankers, 32 m3 (8,500 US gal; 7,000 imp gal) of chemical dispersants and one chemical laboratory.

Ships

The two units, built in Muggiano and Riva Trigoso bear the names of two World War II torpedo boats of the Italian Royal Navy. These units operate in conjunction with NUMC COMSQUAPAT1 of COMFORPAT, the Forces Command patrol for surveillance and Coastal Defence and have their operational base in Augusta. They serve as coastal patrol and traffic control, cargo and surveillance in immigration control.

 Italian Navy - Sirio class
Name Pennant
number		 Shipyard Laid down Launched Commissioned Motto Status
Sirio P 409 Fincantieri
Riva Trigoso
completed at Muggiano[3]		 2001 11 May 2002 30 May 2003 Sidus Vigilans
Orione P 410 29 November 2001 27 July 2002 1 August 2003 Lumen et fides

References
  1. "Sirio - Marina Militare". Archived from the original on 9 November 2018. Retrieved 19 November 2016.
  2. "The Defenders" (PDF). Fincantieri. Retrieved 18 June 2021.
  3. "Fincantieri". porto.laspezia.it (in Italian). Retrieved 18 June 2021.
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