MS Sirena

Sirena in Sorrento, Italy, in 2016.
History
Name:	1999–2002: R Four 2002–2009: Tahitian Princess 2009-2016: Ocean Princess 2016-present: Sirena
Owner:	1999–2001: Renaissance Cruises 2002–2016: Princess Cruises 2016-present: Oceania Cruises
Operator:	1999–2001: Renaissance Cruises 2001–2002: laid up 2002–2016: Princess Cruises 2016-present: Oceania Cruises
Port of registry:	Liberia, Monrovia 1999–2002  Gibraltar 2002–2005  Bermuda, Hamilton 2005–2016  Marshall Islands 2016–present
Builder:	Chantiers de l'Atlantique St. Nazaire, France
Cost:	GB£150 million
Yard number:	O31
Christened:	December 1999
Acquired:	1999
Identification:	Call sign: ZCDS4 IMO number: 9187899 MMSI no.: 310505000
Status:	In service
Notes:
General characteristics (as Ocean Princess)
Class and type:	R class cruise ship (as built) Regatta class cruise ship (currently)
Tonnage:	30,277 GT 2,700 DWT
Length:	181.00 m (593 ft 10 in)
Beam:	25.46 m (83 ft 6 in)
Draught:	5.80 m (19 ft 0 in)
Decks:	11 (9 passenger accessible)
Installed power:	4 × Wärtsilä 12V32 13,500 kW (combined)
Propulsion:	Twin propellers
Speed:	18 knots (33 km/h; 21 mph)
Capacity:	688 (lower berths) 826 (all berths)
Crew:	373
Notes:

Sirena, formerly R Four, Tahitian Princess, and Ocean Princess is an R-class cruise ship formerly owned by Princess Cruises. When part of the Princess fleet, along with the Pacific Princess, Ocean Princess was one of the two smallest in the fleet. In March 2016, she was sold to Oceania Cruises and renamed Sirena.

The vessel entered operation in 1999 under the flag of Renaissance Cruises. The ship was not owned by the company; instead she was owned by a group of French investors. When Renaissance declared bankruptcy in 2001, the ship was seized by creditors, along with the other seven vessels in the fleet.

In 2002, Princess Cruises secured a two-year lease for R Four and her sister ship R Three (now Pacific Princess). The vessel entered operation at the end of 2002, and was renamed Tahitian Princess. At the end of the lease, Princess Cruises purchased both vessels.

In November 2009 the Tahitian Princess was renamed Ocean Princess to "reflect a more global theme."

It was announced on November 25, 2014, that the ship is to be sold to Oceania Cruises under a definitive agreement. The ship was sold for 82.000.000 $. She departed the Princess fleet in March 2016 and underwent a 35-day, $40 million refurbishment in Marseille, France to become Sirena. On April 27, 2016, The Sirena was christened and entered service for Oceana Cruises.

Tender from MS Tahitian Princess in Tórshavn, Faroe Islands

MS Ocean Princess in Tallinn, Estonia

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