Board Thread:Questions and Answers/@comment-25730832-20150228151030/@comment-749631-20151220014255

According to wikiwiki, They use 900 as the base bonus, and then they have Katori/flagship level bonus = [ flagship level + 10 × √(Flagship level) ], round down to the nearest ten. They also give the following ship level modifier: Level ： Modifier 1～ 9 ：1.50×  10～ 19 ：1.25×  20～ 29 ：1.10×  30～ 69 ：1.00×  70～    ：0.90×

However their data have a few exception and even data on this page does not seem to fully explain those difference despite it might have to do with their data recording? Here are some of those data:

(Legend: First number is # of data, then double circle mean GS, the six number after mean six ship's level, next six number mean exp gain, then it is GS modifier, random number modifier, Katori Level Bonus, next six number are ship level modifier for each ship [Note That While Flagship Does Not Enjoy This Bonus, Their Number Still Present In The Table Probably For Prettiness] and the last six numbers are difference from expected value.)

4	◎	19	5	18	18	19	35	6750	5490	4575	4575	4500	3660		2	2	60	1.25	1.5	1.25	1.25	1.25	1		0	0	0	0	-75	0

7	◎	35	23	15	72	72	72	2600	2262	2262	1701	1701	1701		2	1	90	1	1.1	1.25	0.9	0.9	0.9		-100	183	-100	0	0	0

18	◎	71	71	71	38	34	1	2430	1755	1755	1950	1950	2825		2	1	150	0.9	0.9	0.9	1	1	1.5		0	0	0	0	0	-100

34	◎	41	20	14	14	9	18	5400	4070	4800	5374	5650	4625		2	2	100	1	1.1	1.25	1.25	1.5	1.25		0	0	175	749	100	0