Gas Turbines For The Fast Fleet Replenishment Tanker

A CGI image of the Fleet Replenishment Tanker.

General Electric has announced that it will provide two LM2500 marine gas turbines for the new Fleet Replenishment Tanker of the Turkish Navy.

While it is not common to install expensive gas turbines to supply ships, the Turkish Navy required a fast tanker to keep up with the frigates and replenish them. Thus the new fleet tanker is getting LM2500’s.

A contract for the construction of the Fleet Replenishment Tanker was signed between Sefine Shipyard in Yalova in July 2017. The ship will provide fuel, water, food, spare parts, medical supplies and ammunition for the combat ships

She is expected to enter service in 2023.

Characteristics:
Length: 194.8 meters
Width: 24.4 meters
Displacement: 22,000 tons
Cruising Range: 4500 nautical miles (NM)
Length of the Sea:> 30 days
Economic Life:> 30 years

PNS Yarmook Spotted On Her Delivery Voyage



The newest warship of Pakistani Navy PNS Yarmook sailed southbound through Istanbul this afternoon. This is the first time that the vessel passed through Istanbul. This is her delivery voyage to Pakistan.

The Pakistani OPV was built in Damen Shipyard, in Galati Romania, the first ship of a class of two. PNS Yarmook was commissioned in Pakistani service with a ceremony held on 13th February in Constanta Romania. The 2300 tonnes vessel is based on Damen OPV 1900 class and has a length of 90 meters and a beam of 14,4 meters.

Damen will deliver the second vessel PNS Tabuk in May 2020.

These vessels will be able to perform a variety of maritime operations and can transport both a helicopter and a UAV. The ship can launch two high-speed RHIBs of 11.5 meters and 6.5 meters simultaneously and also has the capability to accommodate two 20 feet TEUs for mission-based operations.

TCG Kınalıada Joins Turkish Navy

TCG Kınalıada in Istanbul Naval Shipyard. This photo was taken on May 2019 by Gökhan Karakaş.

The fourth and the final Ada class Corvette TCG Kınalıada was commissioned to the Turkish Navy on 29th September 2019.

TCG Kınalıada has entered into service 8 years after the first ship of the class was commissioned. Her entry also means the completion of Milgem class corvette production for the Turkish Navy.

On the outside, TCG Kınalıada may very much look like the first ship TCG Heybeliada, but she incorporates significant improvements reflecting the advance of the Turkish defense industry during the last decade:

  1. TCG Kınalıada is the first ship ever to be fitted with the indigenous Atmaca anti-ship missile. The corvette is expected to conduct a live firing of the missile in November. When officially commissioned Atmaca will be fitted back to the existing warships in the inventory.
  2. TCG Kınalıada and TCG Burgazada are fitted with Aselsan Seaeye-Ahtapot electro-optic sensor on the aft mast while the previous ships use Aselflir 300. Aselflir 300 was originally designed for airborne platforms and was installed without much modification for a service on a warship. Thus the meantime between regular maintenance is quite short for a maritime system and the whole sensor must be taken down for the maintenance. These shortcomings are rectified in Seaeye-Ahtapot. It has a better tracking range and resolution.
  3. TCG Kınalıada and TCG Burgazada have Aselsan made Hızır countermeasure system for torpedo attacks.  The system consists of two decoy launchers on both sides of the funnel and one towed array and decoy. Though the system is very similar to a torpedo countermeasure system SeaSentor manufactured by Ultra, used the other ships. The logistics of a locally constructed system is preferred by the end-user.
  4. Another important change inside TCG Kınalıada is the new Genesis Advent combat management system with network-enabled capability. This new CMS has native data link capability and can manage Link 11,16 and 22 at the same time. It increases situational awareness. When ships are installed with Genesis Advent they will be able not only to see and share the same tactical picture but also to control and train each other’s sensors and weapon systems.

When I was watching the commissioning ceremony, I couldn’t stop thinking about, what would have happened, if the tender for the construction of 6 Milgem class, won by RMK Marine Shipyard had not been canceled back in 2013. Since the cancelation of the project happened before the completion of the contract negotiation thus we will never know the planned delivery dates. But surely we would have 2 to 3 more Milgem type corvettes in inventory as we do have now.

Even the best ship cannot be in two places at the same time.  And we need more warships now both to rejuvenate our aging fleet and to protect our interest in the blue homeland.

An Afternoon On TCG Burgazada

TCG Burgazada. The third Milgem class corvette.

TCG Burgazada. The third Milgem class corvette.

During the IDEF 2019 defense exhibition last week I had the privilege to visit TCG Burgazada.

TCG Burgazada is the third of the four Ada class corvettes. She was commissioned on 4th November 2018 and is the newest warship of the Turkish Navy.

Turkish Navy always considered the first two ships as prototypes. The lessons learned in constructing and using these ships were to be incorporated in the subsequent ships as there were under construction. Thus TCG Burgazada is slightly updated compared to TCG Heybeliada and TCG Büyükada, though these changes are subtle and mostly not visible from the outside at all.

One exception is the new Aselsan Seaeye-Ahtapot electro-optic sensor on the aft mast while the previous ships use Aselflir 300. Aselflir 300 was originally designed for airborne platforms and was installed without much modification. Thus the mean time between regular maintenance is quite short for a maritime system and the whole sensor must be taken down for the maintenance. These shortcomings are rectified in Seaeye-Ahtapot and the operators are quite happy with its performance. But Aselsan needs to come up with a better and catchier name.

The other changes are under the skin. The main machinery has 10.000 more horsepower making TCG Burgazada faster than the other Ada class ships.

TCG Burgazada has Aselsan made Hızır countermeasure system for torpedo attacks. She is the first ship to be fitted with this system. The system consists of two decoy launchers on both sides of the funnel and one towed array and decoy. Though the system is very similar to Ultra built torpedo countermeasure system used on the other ships I believe the logistics of a locally built system is preferred by the end user.

One could still get “the new ship smell” when walking through the passageways.

I wish fair winds and following seas to TCG Burgazada and her crew.

TCG Anadolu Has Been Floated

TCG Anadolu, temporarily in her element. Photo: Ali Özkök

TCG Anadolu has been floated on 4th May 2019. It is important to note that it is a technical procedure and not the official launching of the ship.

TCG Anadolu is being constructed on a floating dock and the keel blocks under her hull need to be relocated. She will be taken back to the dock after the keel blogs have been relocated and the construction will continue.

The ship was floated 4 days after she suffered a fire. The fire broke out as some isolation material caught fire when welding was done nearby. Although there is no visible damage from the outside, the fire must have damaged the parts of the ship. Since the construction of the ship continues the repair of the damaged parts won’t be much difficult.

First Logistic Support Ship On Builders Trials

First, of the two logistic support ships, A-574 TCG Yüzbaşı Güngör Durmuş has started her shipyard trials. These two ships will be a welcomed addition to the existing fleet of tankers and replenishment ships of the Turkish Navy.

These ships do not have a rig for underway replenishment alongside but will be able to stream a fuel hose astern for a more old fashioned way.

TCG Yüzbaşı Güngör Durmuş is constructed by Selah Shipyard and should have been handed over to the Navy 18 months ago.

Korkut-D Air Defence System Remodeled

Left, a screen capture of TCG Sokullu Mehmet Paşa as she is transiting through Istanbul. Note there is no 100mm gun or the Korkut-D CIWS at the aft of the ship. Right, an archive photo of the Korkmaz on board of the ship from 2018.

Today TCG Sokullu Mehmet Paşa made a northbound passage through Istanbul. This ship was built for Germany Navy as FGS Donau, by Schlichting-Werft in Travemünde as a tender for fast attack boats. She was transferred to the Turkish Navy in 1995 to replace the old ship of the same name.

TCG Sokullu Mehmet Paşa was selected as a test platform for the Korkut-D close-in weapon system. In 2018 the 100mm gun turret at the aft of the ship on X position was replaced with a Korkut-D mount and a 3D radar mast. As the ship passed today the Korkut-D system was no longer on board meaning the test are officially over. It was interesting to note that the original gun mount was not replaced.

Left, the Korkut-D mount during the test on board of TCG Sokullu Mehmet Paşa. The fire control radar is on the mount while the 3D search radar is on a separate mast. Right, rendering of the remodeled Korkut-D mounts with and without the 3D radar.

It is quite easy to fit a weapon system to the ships which are on the design table. We will see Korkut-D on the future Turkish warships if the Turkish Navy is satisfied with the end product. But it is much more difficult to retrofit a new weapon system such as Korkut-D to existing ships. It should not penetrate decks, not worsen the stability of the ship and not add too much weight.

Aselsan, the manufacturer of the Korkut-D CIWS system seems to have remodeled the mount. During the tests, the original Korkut-D mount has only the fire control system mounted on the turret while the 3D search radar was on a separate mast. It was at the end of the turret and on the center as the guns were quite forward. On the remodeled turret, the fire control system is located to the left side of the turret and the guns seem to be moved a little to the back more towards the center of the turret. The new configuration will no doubt have shortened the overall length of the system making it easier to fit into smaller spaces and increased the possibility of changing the legacy close-in weapon system on older warships with Korkut-D.

TCG Ufuk Launched

The previously unnamed test and evaluation ship has now a name and a pennant number: A-591 TCG Ufuk.

The ship, the first one in Turkish Navy to bear that name, was launched on 9th February 2019.

TCG Ufuk shows a striking resemblance to Ada class corvettes. Even some main physical attributes like the length, width, drought of the ships are the same. Here is a comparison chart:

TCG Ufuk Ada Class
Length (meters) 99,5 99,5
Width (meters) 14,4 14,4
Draft (meters) 3,6 3,9
Displacement (tons) 2400 2300
Speed (knots) 18+ 29

Two most obvious differences between this ship and the Ada class corvettes are that that TCG Ufuk doesn’t have any weapons.  The test and evaluation ship does have a flight deck to support 10-tonne class helicopters but does not have a hangar.

According to news reports, TCG Ufuk will have an all diesel main propulsion whereas the Ada class ships have a combined gas turbine and diesel engines as main propulsion. The top speed is given as 18+ knots, which is considerably slower than 29 knots top speed of Ada class corvettes.

During the launching ceremony, the President of Turkey Mr. Erdoğan told that this ship was the first intelligence gathering ship built by national means and mentioned the importance of signal intelligence.

The intelligence gathering mission of this ship may explain why the ship will have a 100 tons more displacement compared to Ada class corvettes despite having no weapons and the sensors associated with fire control and why its construction was not published much compared to other defense industry projects.

The commissioning of TCG Ufuk is scheduled for July 2020.

Test And Evaluation Ship Takes Shape

A CGI image of the Test and Evaluation Ship showing her general configuration. The lack of weapons, the enclosure of the section between the funnel and the mast are particularly striking features.

 

The project was first made public in a presentation made by Undersecreteriat for Defence Industries, (SSM) during the 7th Naval Systems Seminar in 2017. SSM simply told that they have signed a contract for a Test and Evaluation Ship.

More information was released in a presentation made by the engineering company STM during the same event. According to STM, they are the main contractor of a project, where one Test and Evaluation Ship (TaES) will be constructed by Istanbul Denizcilik Shipyard. The ship will have hull form of Ada class corvettes. Aselsan, as a subcontractor is responsible for the manufacturing of the mission systems to be used on board.

STM also shared the above photo. The ship showed there has a striking resemblance to Ada class corvettes. Two most obvious differences between this ship and the Ada class corvettes are this ship doesn’t have a gun in A position and any other weapons. The space between the mast and the funnel, where 8 Harpoon missiles are installed in Ada class ships doesn’t exist in the TaES. The aft of the superstructure is also slightly different. The superstructure aft of the funnel is larger since the TaES doesn’t have the STAMP remote-controlled gun system and anti-torpedo countermeasures system, the deck on which these systems are installed is added to the hull.

According to news reports, the TaEs will have an all diesel main propulsion whereas the Ada class ships have a combined gas turbine and diesel engines as main propulsion. The top speed of the TaES will be lower than Ada class corvettes.

Since TaES shares the same hull and superstructure of the Ada class corvettes, I believe the physical measurements of the TaES will be same or very similar of Ada class ships.

On the left are the mast and forward superstructure of the first Ada class corvette TCG Heybeliada. On the right are the mast and the forward structure of the Test and Evaluation Ship. Although the shape is similar, the number of supports on the mast of the TaES is much more compared to TCG Heybeliada. Obviously, more sensors will installed on TaES.

The stern view of the TaES and TCG Heybeliada. The TaES does have a flight deck and a hangar. But the shape of the superstructure at the aft is different.

ÇAFRAD Successfully Completes First Live Fire Test

The test bed for the ÇAFRAD prototype, TCG Göksu sailing through Bosphorus.

The large structure on the flight deck houses the illumination radar, multifunctional radar, and the IFF interrogator. The arrays of the radars are looking to the starboard side of the ship. Power generators and HVAC systems are also mounted on the flight deck.

 

On 13th December 2018, it was announced that a RIM-162 ESSM missile fired from the frigate TCG Göksu hit a target drone. The live shooting exercise was important as the target was tracked and illuminated by Turkish made radar system.

In November 2018 Turkish Navy started to field testing an Active Electronically Scanned Array (AESA) radar prototype manufactured by Aselsan. The prototype was installed on the flight deck of the Gabya –O.H. Perry-class frigate TCG Göksu.

The technology demonstrator prototype installed on board of TCG Göksu has only one set of multifunctional phased array radar and illumination radar. The arrays of the radars are looking to the starboard side of the ship. Power generators and HVAC systems are also mounted on the flight deck.

The ASEA radar project named ÇAFRAD (Turkish abbreviation of Multi-Functional Phased Array Radar) was first made public in 2012. The contract for the Phase I, was signed in August 2013 between Aselsan and –the then- Undersecretriat of Defence Industries. The contract value is 200 Million Turkish Liras.

Phase I covers the design, development, manufacture, and testing of the ÇAFRAD prototype, to be composed of an X-band multifunctional phased array radar, an X-Band illumination radar and an IFF system with nonrotating AESA antenna.

Phase II covers the design and development of a long-range active phased array radar and the development of multi-face antenna versions of multifunctional radar and illumination radar.

The multifunction active phased array radar will have a range of around 150km and it will be used for, horizon searches, air, and surface target detection, tracking and classification, small, low altitude and high-velocity air target detection and tracking.

The long-range active phased array radar will be used for, long range volume searches, air and surface target detection and tracking. When finished it will have a range of 450km.

The active phased array illuminator will be used for semi-active missile guidance.

The factory acceptance tests for the prototype were scheduled for 2017 and the testing on board of a warship was planned for the first half of 2018. Now with the FATs finished field testing has stated. When the tests on board TCG Göksu are completed SSB will start the Phase II. The deliveries of complete systems are planned for 2023.

When finished, the ÇAFRAD system is intended to be installed as the main sensor and fire control system on board of the TF-2000 air defense warships.

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