User blog comment:Kitahara/Recording drum expedition success rates/@comment-25196231-20150123104544

Going to give you something more to test.

There are sources that says equipping over some drums and fleet total level by a percentage increases GS rates. Then there is "time" you can try factoring in. receiving the fleet at 2:20 mark or receiving the mat 3hr mark. Although I haven't recorded my data but with 1-2 sparkled ships, 4 drums, fleet total level = 73+73+83+83+56+65= 433, and receiving my fleet along with the 37/38 every 3 hr, I've seen GS exhibiting over 50% on exped 21.

I'll keep track of some data when I remember to.