In-between calibers

[Speglord]

Hi there devs/Nick/whomever it may concern:

Are there any plans to add in-between calibers, which featured frequently in this era of naval warfare? i.e 3.9 inch, 4.7 inch, 7.5 inch, 9.2 inch, 9.4 inch, 13.5 inch, and a few others. And of course if aircraft/AA guns are ever introduced, you'll have things like 2.5 inch, 1.5 inch, 0.8 inch, 0.5 inch (machine guns), etc. 

[DougToss]

I was thinking about that. It’s complicated by some countries using metric and some imperial too. You could say 4 inch, 100mm, 102mm and 105mm guns are the same, and that wouldn’t be wrong, but as you climb in calibre the middle ground becomes important. Particularly the British intermediate calibre guns don’t sort easily to the nearest inch, despite being Imperial measurements.