Talk:15m Duplex Rangefinder + Type 21 Radar Kai Ni/@comment-176.112.74.62-20160826083012/@comment-25284995-20160827135354

AP shell is good in dealing more accuracy and firepower bonuses against heavy armored type  and installation type  Abyssals.

If you prefer something like 10+ (or even 20+) accuracies with no RNG gambling in Cut-In stand attacking, then you might try double main guns + recon seaplane + radar setup.