Spica/Orsa-class TB's

I was looking at painting up some of these soon, and I was browsing the cards. I noticed that the ROF for the AA for both classes is "0". Is this a typo?

No typo for the current version. since the granularity of the current AA scores is anything between 1-6 the TP-boats were supposed to have AA 1, but since they also have DP guns, they already have AA one, so the regular AA was set to 0 to compensate.
These odd things are one reason for me to revisit the AA mechanics, especially the RoF's. Check the relevant thread for how things might look in the next version (officially 1.3.7, but considering the amount of changes to so many aspects of the game I might as well just call it 2.0)