User blog comment:Homuhomu123/Trigger Rates & Effectiveness of Anti-Air Cut-In (AACI)/@comment-124.122.131.0-20150608051705/@comment-124.122.131.0-20150608092050

I already looked into Homuhomu replied below and my understanding are as in the [bracket] that I borrow from that replied:

"20.3cm + 12.7cmHAFD[B] + 90mm[B] + AA radar[R]"is actually classified as "B.B.R", or "Built-in + Built-in + Radar", api value 5. The main gun is only useful when Sanshiki (T3 shell) is also available, thus not considered in the pattern.

From that replied loadout, the ones that matter should be 12.7cmHAFD and 90mm as both are [B]uilt-in AAFD equipment. The AA Radar is [R] in the pattern. These made them B.B.R. which is 5 API. Homu even stated that the main gun is not considerd in this pattern.

I will tried 3BB and 3SS on 3-5 later :3