User blog comment:Dragonjet/KanColle English DB/@comment-24835439-20140419151825/@comment-24816414-20140420101348

Yes I think you should remove the "I didn't notice" option. The didn't notice basically reduces the number of sorties in the nodes. If you pass a node 10 times but select "didn't notice" 5 times you are saying you passed the node 5 times.

The selection of "didn't notice" will affect indirectly the % of drop. For example: if you are looking for ship X and you get a no drop and report it as "didn't notice" you are actually increasing the % of X (because you are considering that the player never visited this node that sortie). If you get dropped a non X ship and you report "didn't notice" you are also increasing the % of X (same reason as before). And finally if ship X actually drops and you for some reason report "didn't notice" the % of the ship will decrease (< this is kinda weird, but maybe it can happen).

So I think you should remove the option "didn't notice" and just have the "No drops", this will affect less the %of drops in general.

And like the anon above said about the equips and ship slots, I think you should ignore it. That thing happens very few times in comparison with how many sorties you (and other people) do, so they wouldn't really affect much the drop rate. This will just make everything more complicated.