The Evaluation of TCG Istanbul’s Design

19 May 2017

During the IDEF 2015 12th International Defense Industry Fair, Turkish Navy shared the first conceptual drawing of the second generation of Milgem class. There was a poster about TCG Istanbul on the Turkish Naval Forces booth during IDEF 2017 too.

I though it would be interesting to compare the photos and see how the design of TCG Istanbul has evolved.

Not surprisingly there are a few changes in design on the outside. Any changes made inside the ship remains elusive. The changes are focused between the bow and midships. It seems as the design of the ship from midships to aft has been found satisfactory.

The most important change is in the shape of the bridge and the mast.Lets look at them:

1. If the darker patches along the hull indicate openable hatches, there is a new hatch at location 1. On Ada class corvettes this area is used for replenishment. Since the design of TCG İstanbul is based on Ada class it is safe to assume that this area will be used for replenishment too. Thus there was a need to implement a hatch there to ease the operations there.

2. The location of the SATCOM antennas has changed. In 2015 there were located towards to the end of the mast. In 2017 there were moved a few meters to the front.

3. There are new antennas there. Their place and shape suggests antennas for an on board electronic warfare system. Probable a local development. The antennas of SATCOM and ECM are pretty close. I hope they won’t create any interference.

4. The photos are not quite detailed but the electro-optical tracking and detection system has changed. In 2015 it was round and ball-shaped like ASELFLIR 300D. In 2017 it has a distinct rectangular shape of Denizgözü-Ahtapot. So the old system used on Ada class corvettes and Tuzla class patrol boats was replaced with a new generation sensor.

5. The shape of the bridge, and the forward part of the mast has changed. In 2015 the forward surfaces had a more slanted slope. In 2017 the slopes are more steep. The roof of the bridge is also less clustered and has more clean lines.

6. The all closed bow guards rails has been modified. The newer version has a bow bulwark and open guard rails. This must have changed the stealthiness of the ship. But the trade-off between becoming a little less stealth and having a flexible forward maneuvering area must be important for the handlers.

The sensors with the exception of the EO system and addition of ECM system and the weapons seem to be unchanged.