20.3cm (No.3) Twin Gun Mount/Bonuses

Ship	Extra Requirement								Note
Mogami Kai Ni (Toku)		+3						+1	Additional guns beyond the 1st will provide an additional +2/+1 (2nd/3rd+ Gun) on top of the base fit bonus.
	+ LOS Radar	+4	+2					+3
	+ Type 21 Air Radar	+1		+3				+2	Non-stackable with Type 21 Air Radar Kai Ni's bonus below
	+ Type 21 Air Radar Kai Ni	+3		+3				+2	Stacks with LOS Radar bonus
Mogami-class Tone-class		+2						+1	Additional guns beyond the 1st will provide an additional +2/+1 (2nd/3rd+ Gun) on top of the base fit bonus.
	+ LOS Radar	+3	+2					+2
Myoukou-class Takao-class		+2						+1
	+ LOS Radar	+3	+2					+2
Furutaka-class Aoba-class		+1
	+ LOS Radar	+1	+1					+1	Non-stackable with LOS Radar bonus from 20.3cm (No.2) Twin Gun Mount