How long between each refueling? French designs calls for 10 years. US/UK new design is lifetime use - 30- 40 years no refueling between. Based on Chakra's experience, it was 10 years before refueling and refitting. Is the same for S-5 submarines?
No and I hope we do not buy any further German products. Germany can basically suck its dick. We have had enough of their uppity attitude and highhandedness and their duplicity.