How to use german carrier ap bombs??

I enjoy playing carriers and recently tried one from each country that I didn’t try before. All of them made sense to me and after a little bit of getting used to I was able to contribute to my team pretty consistently. One exception being the german carriers and their ap bombs. How do they work…? If they hit the citadel it does massive damage but it feels completely random. I’m hitting most if not all of my bombs each time I dive and they do abysmal damage. Is there a certain height that I should be dropping from? I’d assume hitting the turrets or the funnels would be citadel hits but it doesn’t seem to be the case. I tried looking online but couldn’t find anything that was super helpful :( any tips/info would be greatly appreciated :D