Do I have to fix the submarines every time before I send them out? Even though they are only used once and have only a little bit worn out. The reason is that even if it is 99% good condition, the mission sometimes still says due to the condition the second roll will not happen. If I have to fix them every single time, then the consumption of the dark matter materials will be very high. Or is the unable to have the second roll due to the condition of the submarines completely RNG?