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New pictures released of the Ukrainian Ada class corvette Hetman Ivan Mazepa.

| 2022

According to information published by Военный Осведомитель on September 19, 2022, new pictures have been released of the Turkish-built Ada (MILGEM) corvette Hetman Ivan Mazepa (F-211) under construction for the Ukrainian Navy at the RMK Marine shipyard in Istanbul.
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Russian Vyborg Shipyard laid the Purga ice class coastguard ship of project 23550 925 001 The future Ukrainian Navy's Ada class corvette Hetman Ivan Mazepa (Picture source: Военный Осведомитель)

The Ada class is a class of anti-submarine corvettes developed primarily for the Turkish Navy during the first stage of the MILGEM project. The Turkish Navy has commissioned all four Ada-class corvettes.

The Ukrainian Ministry of Defense has ordered 2 corvettes with construction to be performed jointly by the Turkish STM and Ukrainian shipyard. Under the deal, the first vessel will be delivered to Ukraine by the end of 2023 unfinished, to then be completed in Ukraine. The deal was signed in December 2020 worth $256 million.

The class vessels are propelled by a RENK CODAG Cross-Connect propulsion plant. It consists of a gas turbine rated at 23,000 kilowatts (31,000 hp) and two diesel engines rated at 4,320 kW (5,790 hp).

Each diesel engine drives one controllable pitch propeller via a two-speed main reduction gear. The cross-connect gear splits the power from the gas turbine via both main reduction gears to the two shafts.

The ship can be operated in Diesel mode, in single gas turbine mode, or in CODAG mode. CODAG is where diesel and gas turbine engines are providing combined power (27,320 kW).

GENESIS (Gemi Entegre Savaş İdare Sistemi, i.e., Ship Integrated Combat Management System), a network-centric warfare management system developed by HAVELSAN and initially used in the upgraded G-class frigates of the Turkish Navy, was contracted for the first two corvettes on 23 May 2007.

In the last Ada-class corvette, Kınalıada, the ADVENT combat management system (an upgraded version of GENESIS) is installed instead of GENESIS system.

It is also planned for Burgazada to be retrofitted with the ADVENT combat management system. The class ships have a national hull mounted sonar developed by the Scientific and Technological Research Council of Turkey.

The sonar dome has been developed by STM's subcontractor ONUK-BG Defence Systems, extensively employing nano-enhanced Fiber Reinforced Polymer.

The Ada class features an Electronic Chart Precise Integrated Navigation System (ECPINS), supplied by OSI Geospatial. Integrated Platform Management System (IPMS) for controlling machinery, auxiliary systems, power generation and distribution was delivered by STM's subcontractor Yaltes JV.

The main systems integrated to IPMS are power management system, fire detection system, fire fighting, damage control system, CCTV system and stability control system.

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