Adding on top of
@ARMalik excellent Post. The major hurdle for PN Submarines were Command and Control systems of Agosta. PN couldn't integrate anything in A-90 without french permission, that too French would have to come and modify the propriety C&C systems to let Pakistan integrate the weapons of it's choice. What Pakistan did to integrate Babur-III with agosta is an open secret. There is a reason Pakistan is not showing Babur III getting fired from a sub. Because whatever changes they have done, done without the authorization of France
Back in DIMDEX-2018, When I discussed Agosta Submarine up-gradation program with Turkish Officials who were involved in the bidding process when PN tendered out the Submarine up-gradation process. They told me they were chosen because they had the capability to replace all the French proprietary systems with turkish one and they were willing to let Pakistan integrate the weapons of its own choice into submarine once Turkish systems are in the Agosta without coordinating with France at all. . That is why they won the bid despite of French taking part in the actual process and turkish outbidding OEM.
When I Asked Will PN be able to integrate strategic and conventional weapons in their submarines once the upgradation completes and Turks will not deny Pakistan like France will. Turkish officials did say that Turkish C&C systems are proprietary and they will be the sole proprietor to do the integrations due to proprietary nature of systems If and when Turkish MoD gives green light and Although Request will have to go through the MoD Turkish, But due to the nature of Pakistan and Turkish relations. We will never ever deny any Pakistani request of integrating any kind of weapons
That was back in 2018. Now the Relations has attained a new height. Where by Turkish will be able to share the source codes of their C&C systems now.
DIMDEX 2020 is 3 months away. It will be interesting this time to hear Turkish views on this subject once again.