Question About Survival (Rotations...)

[HalotroopermanX7]

So I went to the wiki and was looking at the drop tables of Loki Prime, in which one of his parts dropped from a survival mission, then in parentheses was: "Rotation (a, b, c...)"

Could somebody please explain to me what these "Rotations" mean?

[Hybridon]

Each 5 mins is one of the rotations. The rotation sequence is A, A, B, C. 5 minutes and 10 minutes you have a chance at rotation A prizes, 15 minutes at rotation B and 20 mins a guaranteed prize from rotation C.

[DangerDaddy]

that means 5, 10, 25, 30, and 45 and 50 are all rotation a

 

it also means 15, 35,and  55 are all rotation b

 

and to close, 20, 40, and 60 are all rotation c

Edited June 18, 2014 by MagiTwister