Advanced firing trainging misunderstanding?

[KriegsmarineDK]

I am thinking about getting advanced firing training for my Bismarck captain but I am not sure if I understood it correctly.

It says +20% to firing range of main battery guns with a caliber up to 139mm, and all secondary battery guns. Does that mean that 139mm limit applies for both primary battery and secondary battery? or 139mm only for primary battery and then +20% to all calibers of secondary battery? 

 

It might just be me who is trash at understanding what it means but I hope you can help me out here :)

[Yamashiro42]

It affects all secondary guns, including both 105mm and 150mm ones on your Bismarck.

[KriegsmarineDK]

Thanks for the help m8. It would just be a let down to think so and then get it and then have to use doubloons to undo it if it wasn't like that. 

[Astolfo_Is_My_Waifu]

It affects all secondaries regardless of calibre, but it only affects primaries up to 139mm.

[KriegsmarineDK]

Thanks for the help :)