I would say that even big korvettes like the IDF S'aar class together with fast PBGs and maybe 2-3 conventional subs should be enough to patrol the coast of SA.
There is no need for big blue water ships. These small ships are able to patrol the area and together with the air force should be able to give most opponents a real headache.
There is no need for big blue water ships. These small ships are able to patrol the area and together with the air force should be able to give most opponents a real headache.