Carlosa got the point with "BPS-500 case", surely, Vietnam MoD was worry about cost overrun and delay on delivery time.
First two Gepard is sample, we placed order in 2007, and it's take Russian shipyard more than 3 year to completed 2 ships.
That is reasons which we don't chose VLS version or project 20382 "Tigr" (
Steregushchy class had problems with supply system). Plus, UKSK VLS is new system, still not mature at that time.
Now, those system were install on many ships of Russian navy, we can expect the same on our modified ships.