An informative video on the Agosta subs by an American Submariner (a Sonar officer)
The other two also got mesma so all three are aip now back in 2000s
Indian current scorpion are still non aip
DCNS has transferred the second MESMA plug, which is intended to be retrofitted to the Pakistani Navy's Agosta 90B submarine, to the company's Nantes Indret facility for testing. MESMA, part of the air-independent propulsion (AIP) system for conventional submarines, will undergo several m
n 2011, Pakistan retrofit the two earlier Agosta-90B vessels with MESMA during overhauls.
Overview of Pakistan's submarine capabilities and import-export behavior.
Lastly Dcn lost to Turkish in a bid to upgrade as most of the upgrades were not related aip or structure but electronics and ew so pn went with Turkish non Oem
Usually aip gets additional weeks not just one week, two many be three with Chinese type
Also introducing new type of batterie which may take it further up-to month