Talk:World 1/@comment-126.124.94.10-20141229030128/@comment-173.59.109.219-20141230121722

It's not. Node D is a node that isn't on the main route, so not as many people go to it meaning there are less reports of drops there, which in turn means a smaller list above. Actually, you're supposedly more likely to get I-168 from node C (3.77%) than you are to get any sub from node D (3.55% in total) according to Kancolle-DB. Node C also has a larger sub pool since it includes I-8 while node D (supposedly) doesn't, further increasing the chances by a tiny amount.

Do note that Admiral Level seems to affect drop rate, so it could be that the reports from Node D are actually from lower leveled TTK with lower drop rates while the reports from Node C are more from higher level TTK with higher drop rates, since being sent to Node D is the game basically telling you that you're doing it wrong. But even so, you're probably better off just farming node C.