if we gonna quad pack not Hisar RF but Siper Block 1 it has serious implication since then the question is who else in the world has a quad packed 100 km range SAM with a booster?
That's related your vls width and missile diameter. İf you can design your vls more wider you can do it. But in the west pact most of the vls producer countries doesnt need to this. Just because they are capable to equip their ships to enough numbered vls systems.
But our problem is diffrent. We need air defence ships immdeatly but first of a possible air defence ship will take a long 4-6 year. Other systems we have or produced have less numbered vls due his ship sizes.
So we need a interm solution until acceptable air defence destoryer fleet size. Most logical and less costly option is using 2 barbaros track II and Tcg istanbul like a Air defence frigate until first Tf-2000 after the another +3 istif and +1 tf-2000 detroyer cards will be redistributed.
Cenk-s on İstif and Smart-s Mk2 + Mar-d + Akr-d on Barbaros Yöm seems capable to operate siper and Genesis Advent is a capable BMS to improve its effiency .
But
16 vls system is not enough for acceptable missile carriage for air defence frigate. So we need multiple pack a missiles. I cannot think siper in a quadpack but doublepack more reliable.
Sm-2 with 343mm theoretically doublepackable.
Atmaca is have 350mm diameter booster seems same with atmaca.
İn a last video seems booster more tight . And looks like its doublepackable.
16 Siper and 32 Essm/Hisar-Rf seems enough per ship until Tf-2000