MT Petali information

	Petali (as Mastera) outside the Port of Rotterdam
History
Name	Mastera (2003–January 2022); Mikines (January–June 2022); Alma (June 2022–2023); Petali (2023–present);
Owner	ABB Credit (2003–2006); SEB Leasing (2006–2014); SSC Maslaiva (2014–2019); SEB Leasing (2019–January 2022); Neste Shipping (January 2022); Omega Shipmanagement (January–February 2022); Neptune Seaway (February–June 2022); Zenaida Seaways (June 2022–2023); Lauriane Shipping Corp (2023–present);
Operator	Neste Shipping (2003–2014); OSM Ship Management (2014–2015); Neste Shipping (2014–January 2022); Chemikalien Seetransport (January–February 2022); Neptune Seaway (February–June 2022); Zenaida Seaways (June 2022–); Lauriane Shipping Corp (2023–present);
Port of registry	Porvoo, Finland (2002–2021); Arendal, Norway (2021–2022); Monrovia, Liberia (2022–);
Route	Primorsk–Porvoo–Naantali (until January 2022)
Ordered	2001
Builder	Sumitomo Heavy Industries Ltd., Yokosuka, Japan
Cost	60–70 million euro (estimate)
Launched	30 September 2002
Completed	8 January 2003
In service	2003–
Identification	Call sign: 5LEL4; IMO number: 9235892; MMSI number: 636021543;
Status	In service
General characteristics
Type	Crude oil tanker
Classification:	Lloyd's Register of Shipping
Tonnage	64,259 GT; 30,846 NT; 106,208 DWT;
Length	252.0 m (826.77 ft) (overall)
Beam	44.0 m (144.4 ft)
Height	53.1 m (174 ft)
Draught	15.3 m (50 ft) (summer); 8.6 m (28 ft) (ballast);
Depth	22.5 m (74 ft)
Ice class	1A Super
Installed power	2 × Wärtsilä 9L38B (2 × 6,0 MW); 2 × Wärtsilä 6L38B (2 × 4.0 MW);
Propulsion	ABB Azipod (16 MW); Two bow thrusters (2 × 1,750 kW);
Speed	15.2 knots (28.2 km/h; 17.5 mph) (max); 13.5 knots (25.0 km/h; 15.5 mph) (service); 3 knots (5.6 km/h; 3.5 mph) (1 m (3.3 ft) ice);
Crew	15–20

MT Petali is an Aframax crude oil tanker. Formerly known as Mastera for almost two decades and briefly as Mikines in early 2022 and Alma until September 2023, she and her sister ship Tempera were the first ships to utilize the double acting tanker (DAT) concept in which the vessel is designed to travel ahead in open water and astern in severe ice conditions.^[7]^[15] The icebreaking tanker was built to transport crude oil year-round from the Russian oil terminal in Primorsk to Neste Oil refineries in Porvoo and Naantali.^[8]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m "Mikines (9235892)". Equasis. Ministry of Ecology, Sustainable Development and Energy. Retrieved 19 March 2022.
^ "Fartøyet LAOI8 MASTERA". Norwegian Maritime Authority. Retrieved 21 September 2021.
^ ^a ^b ^c ^d ^e ^f "Alma (9235892)". Sea-web. S&P Global. Retrieved 26 June 2022.
^ "Mastera (9235892)". Miramar Ship Index. Retrieved 13 March 2020.
^ ^a ^b ^c ^d Vapalahti, H: Finnish illustrated List of Ships 2007. Judicor Oy, 2008.
^ "Suomen suurin öljytankkeri ruotsalaisomistukseen: "Merimiehet huutavat liikenneministeri Sanna Marinin ja pääministeri Antti Rinteen perään"". Iltalehti (in Finnish). Alma Media Suomi Oy. 5 August 2019. Retrieved 6 August 2019.
^ ^a ^b The development of the new double acting ships for ice operation Archived 2012-03-03 at the Wayback Machine. Aker Arctic, 2001.
^ ^a ^b Remmiä kaulan ympärillä kiristetään jatkuvasti. Merimies - Sjömannen, 3/10^{[permanent dead link]}. Suomen Merimies-Unioni. Retrieved 2011-09-20.
^ ^a ^b ^c "Mastera/Tempera". Neste Oil. 2004. Archived from the original on 29 September 2011. Retrieved 20 September 2011.
^ Cite error: The named reference tt was invoked but never defined (see the help page).
^ MASTERA: double-acting tanker for Arctic routes. Significant Ships 2003, page 66.
^ Cite error: The named reference vapaavahti42010 was invoked but never defined (see the help page).
^ Cite error: The named reference refine107 was invoked but never defined (see the help page).
^ Fortum ́s Double Acting Tankers. ABB. Retrieved 2014-04-03.
^ Cite error: The named reference tekniikkajatal was invoked but never defined (see the help page).

[equasis-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m "Mikines (9235892)". Equasis. Ministry of Ecology, Sustainable Development and Energy. Retrieved 19 March 2022.

[norflag-2] "Fartøyet LAOI8 MASTERA". Norwegian Maritime Authority. Retrieved 21 September 2021.

[seaweb-3] ^ ^a ^b ^c ^d ^e ^f "Alma (9235892)". Sea-web. S&P Global. Retrieved 26 June 2022.

[4] "Mastera (9235892)". Miramar Ship Index. Retrieved 13 March 2020.

[vapalahti-5] Vapalahti, H: Finnish illustrated List of Ships 2007. Judicor Oy, 2008.

[2019ownerchange-6] "Suomen suurin öljytankkeri ruotsalaisomistukseen: "Merimiehet huutavat liikenneministeri Sanna Marinin ja pääministeri Antti Rinteen perään"". Iltalehti (in Finnish). Alma Media Suomi Oy. 5 August 2019. Retrieved 6 August 2019.

[akerarctic-7] The development of the new double acting ships for ice operation Archived 2012-03-03 at the Wayback Machine. Aker Arctic, 2001.

[smu-8] Remmiä kaulan ympärillä kiristetään jatkuvasti. Merimies - Sjömannen, 3/10^{[permanent dead link]}. Suomen Merimies-Unioni. Retrieved 2011-09-20.

[nesteoil-9] "Mastera/Tempera". Neste Oil. 2004. Archived from the original on 29 September 2011. Retrieved 20 September 2011.

[tt-10] Cite error: The named reference tt was invoked but never defined (see the help page).

[signships-11] MASTERA: double-acting tanker for Arctic routes. Significant Ships 2003, page 66.

[vapaavahti42010-12] Cite error: The named reference vapaavahti42010 was invoked but never defined (see the help page).

[refine107-13] Cite error: The named reference refine107 was invoked but never defined (see the help page).

[abb_tempera-14] Fortum ́s Double Acting Tankers. ABB. Retrieved 2014-04-03.

[tekniikkajatal-15] Cite error: The named reference tekniikkajatal was invoked but never defined (see the help page).

History
Petali (as Mastera) outside the Port of Rotterdam
Name	Mastera (2003–January 2022) Mikines (January–June 2022) Alma (June 2022–2023) Petali (2023–present)^[3]
Owner	ABB Credit (2003–2006)^[1] SEB Leasing (2006–2014)^[5] SSC Maslaiva (2014–2019)^[1] SEB Leasing (2019–January 2022)^[6] Neste Shipping (January 2022)^[1] Omega Shipmanagement (January–February 2022)^[1] Neptune Seaway (February–June 2022)^[1] Zenaida Seaways (June 2022–2023)^[3] Lauriane Shipping Corp (2023–present)^[3]
Operator	Neste Shipping (2003–2014) OSM Ship Management (2014–2015)^[1] Neste Shipping (2014–January 2022)^[1] Chemikalien Seetransport (January–February 2022)^[1] Neptune Seaway (February–June 2022)^[1] Zenaida Seaways (June 2022–)^[3] Lauriane Shipping Corp (2023–present)^[3]
Port of registry	Porvoo, Finland (2002–2021) Arendal, Norway (2021–2022)^[2] Monrovia, Liberia (2022–)
Route	Primorsk–Porvoo–Naantali (until January 2022)^[8]
Ordered	2001^[7]
Builder	Sumitomo Heavy Industries Ltd., Yokosuka, Japan^[9]
Cost	60–70 million euro (estimate)^[10]
Launched	30 September 2002^[4]
Completed	8 January 2003^[3]
In service	2003–^[9]
Identification	Call sign: 5LEL4^[1] IMO number: 9235892^[1] MMSI number: 636021543^[1]
Status	In service^[1]
General characteristics ^[9]
Type	Crude oil tanker
Classification:	Lloyd's Register of Shipping
Tonnage	64,259 GT 30,846 NT 106,208 DWT
Length	252.0 m (826.77 ft) (overall)
Beam	44.0 m (144.4 ft)
Height	53.1 m (174 ft)
Draught	15.3 m (50 ft) (summer) 8.6 m (28 ft) (ballast)
Depth	22.5 m (74 ft)
Ice class	1A Super
Installed power	2 × Wärtsilä 9L38B^[5] (2 × 6,0 MW) 2 × Wärtsilä 6L38B^[5] (2 × 4.0 MW)
Propulsion	ABB Azipod (16 MW) Two bow thrusters (2 × 1,750 kW)^[11]
Speed	15.2 knots (28.2 km/h; 17.5 mph) (max)^[5] 13.5 knots (25.0 km/h; 15.5 mph) (service) 3 knots (5.6 km/h; 3.5 mph) (1 m (3.3 ft) ice)^[14]
Crew	15–20^[12]^[13]