Talk:World 4/@comment-27046896-20151109165811/@comment-26464279-20151109190428

According to kancolle-db it's 0.92%. Half of the drop chance from 2-5.

Go to kancolled-db.net -> 潜水母艦 -> 大鯨 龍鳳 龍鳳改 if you want to see all her drop rates. The 2nd and 3rd Kanji of the ship type are easiest to recognize in the navigation chart on the left side.

Best places are 2-5 followed by 5-2.