I would like to give my personal position on the last two answers above.
I answer to the user xbat, the two corvettes are units of limited size and displacement, you lose more than very dated design, so it is unthinkable that on them you can install all the systems to make them able to cover all attack missions at 360 ° and defense.
Therefore they identified the primary mission that is the anti-ship attack with long-range missiles, but .... and there is always a but,
1 °) the Iranian technicians have also intervened in the artillery sector with the installation at the bow of the Fajr-27 (aka Oto Melara 76/62 Compact) which exponentially increases the original anti-aircraft defense capabilities + I think they use MANPADS to help with protection .
2 °) true, these corvettes do not have a CIWS system, but lately a new system is installed on the Sahand frigate and I am convinced that once the operational tests are completed, this CIWS could easily replace the antiquated twin 40mm Bofors.
3 °) Despite the current configuration rewards the anti-ship capabilities, the two corvettes still maintain an ASW capacity, thanks to the 2 324 mm ASW triple torpedo launchers and the present hull sonar, of which we do not know if it is the original one , or has been updated or replaced.
With this, I would also like to respond to user Tamiyah,
as written above these 2 corvettes are of limited size, therefore they either chose to build the flight deck for a helicopter with ASW capacity, but everyone is aware that the Persian Gulf is not very suitable to operate with conventional submarines and even less for the gigantic ones nuclear submarines, even more so that the nations bordering this sea currently do not have submarines;
or, as a matter of fact, they chose the main anti-ship configuration, this last one probably taken precisely by carefully evaluating the surface forces that the possible opponents have at their disposal to which they can launch their 4 missiles from considerable distances, while maintaining a polyvalent capacity also in the ASW fight with 324mm torpedoes
This does not mean that the ships are invulnerable, indeed, but in the past difficulties in the sector of naval units with the ability to sail on the high seas, the modernization of these old ladies of the sea seems to have given good results in terms of experience in extensive repairs and in the integration and use of new armaments, including some rethinking of how and where to install anti-ship missile canisters after operational use.
