Sedef Shipyard

Sedef Shipyard, also known as Sedef Tersanesi, is a Turkish shipbuilding company based in Tuzla, Istanbul. Established in 1972 in Gebze, Kocaeli, the yard later moved its principal operations to Tuzla in 1990 and also maintains a location in Orhanlı, Istanbul. Its work spans military and commercial shipbuilding, placing the company within Turkey's strategically important maritime industrial sector. The shipyard became a subsidiary of Turkon Holding in 2000. This change connected Sedef to a broader Turkish business group with interests in maritime activities and provided an ownership structure for the yard's subsequent development. Sedef's capabilities expanded beyond conventional commercial construction as it obtained the documentation and qualifications required to participate in military projects in 2009. A major turning point came in 2013, when Sedef won the tender for a multipurpose amphibious assault ship project for the Turkish Naval Forces. The resulting vessel, TCG Anadolu, became the company's best-known defense program and was designed as a large platform capable of transporting an amphibious force, including one battalion. Construction began in 2015 and the ship was launched in 2019. The project established Sedef as a prominent participant in Turkey's naval modernization and domestic defense-industrial policy. Sedef's publicly identified output also includes commercial ships and floating power-generation vessels. The latter include a series of Karadeniz Powership vessels associated with mobile electricity-generation projects, while other listed work includes the MV Arctic Sea. These projects illustrate the yard's ability to serve both maritime transport and specialized offshore or energy-related requirements. The company's principal identity is that of a project-focused shipyard rather than a consumer-facing product brand. Its positioning rests on engineering, fabrication, integration, and delivery of large vessels for institutional, commercial, and defense customers. Military programs require compliance with qualification and procurement requirements, while commercial work requires coordination with shipowners, operators, classification processes, and technical suppliers. Sedef operates from the Istanbul maritime manufacturing cluster, with Tuzla serving as its principal base. Its portfolio and publicly reported projects indicate a business model centered on contract-based vessel construction rather than standardized mass production. The Turkish Navy has also planned a sister ship to TCG Anadolu, to be named TCG Trakya; the available reference material describes this as planned rather than confirming construction or delivery by Sedef. Current ownership, executive leadership, financial performance, and detailed production capacity are not established in the supplied reference material.

Sedef Shipyard was established in 1972 in Gebze, in Turkey's Kocaeli province. The company initially developed as a shipbuilding enterprise serving maritime construction requirements. In 1990, it moved its main shipyard operation to Tuzla, Istanbul, an important center of Turkish shipbuilding. The company is also associated with an Orhanlı location in Istanbul, giving it two principal sites in the country. In 2000, Sedef became a subsidiary of Turkon Holding. The change placed the shipyard within a larger Turkish corporate group and marked an important phase in its organizational history. Sedef subsequently continued work across commercial and specialized vessel construction, including ships associated with maritime transport and floating power-generation operations. The company's participation in defense shipbuilding became more significant in 2009, when it obtained the necessary qualifications and documentation to take part in military projects. This qualification enabled Sedef to compete for Turkish defense contracts and broadened its role beyond commercial shipbuilding. In 2013, Sedef won the tender for a Turkish Naval Forces project involving a multipurpose amphibious assault ship. The planned vessel was intended to become the largest ship in the Turkish Navy and to carry an amphibious force of battalion scale. The project was subsequently named TCG Anadolu. Construction started in 2015, making the program one of the most important publicly documented milestones in Sedef's history and in Turkey's naval-industrial development. TCG Anadolu was launched in 2019. The vessel became the shipyard's most prominent defense project and demonstrated Sedef's involvement in the construction of a large, complex naval platform. The Turkish Navy has planned a sister ship named TCG Trakya, although the supplied reference material does not establish that construction has begun or that Sedef has completed the vessel. Alongside its defense work, Sedef's listed vessels include MV Arctic Sea and several Karadeniz Powership ships: MV Karadeniz Powership Ayşegül Sultan, MV Karadeniz Powership Doğan Bey, MV Karadeniz Powership Fatmagül Sultan, MV Karadeniz Powership Gökhan Bey, MV Karadeniz Powership İrem Sultan, MV Karadeniz Powership Onur Sultan, MV Karadeniz Powership Orhan Bey, MV Karadeniz Powership Osman Khan, MV Karadeniz Powership Yasin Bey, and MV Karadeniz Powership Zeynep Sultan. The available material identifies these as part of the shipyard's product or construction record but does not provide individual completion dates, technical specifications, customers, or contract values. Today, Sedef is best understood as a Turkish contract shipbuilder with capabilities covering naval defense projects, commercial vessels, and floating power-generation platforms. Its corporate history is defined by the move to Tuzla, integration into Turkon Holding, qualification for military work, and the TCG Anadolu program. Detailed information about current management, revenue, order backlog, workforce, ownership beyond the holding-company relationship, and present production capacity is not established by the supplied sources.

1. 2019TCG Anadolu launched

   The shipyard launched TCG Anadolu for the Turkish Naval Forces.

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2. 2015TCG Anadolu construction begins

   Construction of TCG Anadolu began at Sedef Shipyard.

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3. 2013Wins TCG Anadolu project tender

   Sedef won the tender for a multipurpose amphibious assault ship project for the Turkish Naval Forces.

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4. 2009Qualified for military projects

   The company obtained the documentation required to participate in military shipbuilding projects.

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5. 2000Becomes a Turkon Holding subsidiary

   Sedef Shipyard became a subsidiary of Turkon Holding.

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6. 1990Operations move to Tuzla

   The shipyard moved its main operations from Gebze to Tuzla, Istanbul.

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7. 1972Shipyard established in Gebze

   Sedef Shipyard was established in Gebze, Kocaeli, Turkey.

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A Turkish defense and commercial shipyard positioned around large, technically complex vessel projects for naval, maritime transport, and floating power-generation applications.

• TCG AnadoluMultipurpose amphibious assault ship2019

  TCG Anadolu is a large naval vessel constructed by Sedef Shipyard for the Turkish Naval Forces. The project was awarded to Sedef in 2013, construction began in 2015, and the ship was launched in 2019. The platform was designed for multipurpose amphibious operations and to carry an amphibious force of battalion scale. It is the most prominent defense project identified in the supplied material.

• MV Arctic SeaCommercial vessel

  MV Arctic Sea is listed among vessels associated with Sedef Shipyard's construction output. The supplied reference identifies it as a commercial ship but does not provide its construction date, technical configuration, customer, or operational history.

• Karadeniz Powership vesselsFloating power-generation vessels

  Sedef's listed output includes a group of Karadeniz Powership vessels, including Ayşegül Sultan, Doğan Bey, Fatmagül Sultan, Gökhan Bey, İrem Sultan, Onur Sultan, Orhan Bey, Osman Khan, Yasin Bey, and Zeynep Sultan. The available source identifies these vessels as part of the shipyard's portfolio but does not supply individual specifications or completion dates.

• 2013Tender award for TCG AnadoluOther

  The Turkish Naval Forces sought a large multipurpose amphibious assault ship as part of a naval capability project.

  What changed. Sedef Shipyard won the tender and took responsibility for construction of the vessel later named TCG Anadolu.

  Aftermath. Construction started in 2015 and the ship was launched in 2019, making the project a defining milestone for Sedef's defense business.

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• 2019TCG Anadolu launched

  Sedef Shipyard launched TCG Anadolu, the large naval platform built for the Turkish Naval Forces.

  Product generation
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• 2015Construction of TCG Anadolu begins

  Construction began at Sedef Shipyard on the multipurpose amphibious assault ship TCG Anadolu under the Turkish naval project awarded in 2013.

  Product launch
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• 2013Sedef Shipyard wins tender for multipurpose amphibious assault ship project

  Sedef Shipyard was selected for a Turkish Naval Forces project to build a large multipurpose amphibious assault ship, later named TCG Anadolu.

  Other
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1. Sedef Shipyard
2. Sedef Shipyard official English website