Talk:U-511/@comment-73.167.111.150-20151203000743/@comment-27200005-20151203074619

http://db.kcwiki.moe/drop/map/%E8%A5%BF%E6%96%B9%E6%B5%B7%E5%9F%9F%E6%88%A6%E7%B7%9A%20%E3%82%B9%E3%83%86%E3%83%93%E3%82%A2%E6%B5%B7.html

Nope she drops from all composition (there is only 1 formation lol, the line ahead formation).

Though most of them obtained Yuu from this composition:

SS Hime (644)/Yo-class SS (531)/Yo-class SS (531)/Wo-class flagship Carrier(617)/Ro-class Destroyer(576)/Ro-class Destroyer(576). Which among these 2198 teitoku, 293 of them obtained from this formation.

You can refer to that web I just posted, it shows detail of it. Those information are obtained from the teitoku who agreed to send data to the website in order for them to calculate the drop rate.(Its in the setting for KC3 Kai, not sure for the others though)