MS Sirena

Sirena at the port of Argostoli, Kefalonia in 2018.
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	[1][2]
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)[3]
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	[1][2]

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."^[4]

It was announced on 25 November 2014, that the ship was to be sold to Oceania Cruises for $82 million under a finance agreement.^[5] She departed the Princess fleet in March 2016 and underwent a 35-day, $40 million refurbishment in Marseille, France, to become Sirena.^[6][7] On 27 April 2016, The Sirena was christened and entered service for Oceania.^[8]

• Ocean Princess GDFL images at Ship Spotting World