I wouldn't be surprised if sleep deprivation was a leading cause. The military in general has a problem with letting people get enough sleep, especially if the

I wouldn't be surprised if sleep deprivation was a leading cause. The military in general has a problem with letting people get enough sleep, especially if the personnel are not on the day shift/watch. With two deadly collisions in the same fleet, I bet there is some silly regulation/task that is keeping watch standers from getting enough sleep. It could be as simple as letting sleeping personnel get pulled into working parties as everyone else is on watch or doing repairs/maintenance. I wouldn't be surprised if things got worse as they pile even more training requirements on trying to fix the issue.