Turkish submarine warfare programs

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Is aselsan two different type hull mounted sonar system?If we analyse the specs they are different may be later one is a improved version of the first one,because later version has wider operation frequency band one to one hundred kHz,although active and passive trancking number is the same wider band same tracking numbers so we expect it should be more,there is something wrong or they need to improve software.It is frequency band is also wider than meteksan yakamos 2020,mean time meteksan are planning to make L-yakamos which is a low frequency sonar for the TF-2000 frigate.We can clearly see a competition between aselsan and meteksan on sonar systems, altough meteksan was chosen by SSB as a sonar center.Milgem ships carry meteksan yakamos sonar systems and pakistan will use on it their improved version of milgem,but we heard that mid life modernisation of meko-200 barbaros class will use aselsan fersah sonar system.Meteksan is also to adjust yakomos sonar system wet end-larger-for the frigates as well,so this is the fruit of competetion

 

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