User blog comment:Tsubakura/Mythbusting the metas of KanColle/@comment-27783338-20170223091519/@comment-28069733-20170223114857

Thats a support expedition only thing and yes, it only applies on the ship it is equipped on.

I wouldn't stack radars for either your main or escort fleet.

Because of the minimal boost of firepower from stacking guns, some opt to stack radars instead to increase the accuracy of the DDs. This is to maximize the chance that the DDs will hit their target and also to optimize them for doing scratch damage instead.

Whether you prefer guns or radars instead is completely dependent on whether the person is a fag or an fag, but if you're dealing with a high HP target or if you're sure that you're not going to be able to punch through the armor even with the extra firepower, consider stacking radars instead.