Board Thread:Event Community Discussion/@comment-25730832-20170511175819/@comment-1637496-20170511204039

Hasemiru wrote: We should have gone with KB since it derives from the first letter that composes the reading of each kanji from the Kancolle abbreviation (Kai-海 /Bō-防 ) or CDS that stands for Coastal Defense Ship which is the official translation.

Kaibōkan(Wikipedia article in English). CD is used on Combinedfleet as abbreviation for the numbered Type C&D. Going by the logic of the admins/mods/whoevertheyareortheythinktheyare the problem is that it's specific.