1 The crews of the cruisers and destroyers in Japan did not have all of their training and certifications because there were no dedicated training periods built into the operational schedules of the vessels.

2 As of June, eight of the 11 destroyers and cruisers based in Japan had expired certifications for mobility and seamanship, air warfare and undersea warfare.

3 The most common reason cited for expired certifications was the operational schedule of the ships.

4 There were plans to revise operational schedules to dedicate training time for overseas-based ships but this schedule has yet to be implemented.

5 The reductions to crew sizes in the early 2000s may now be creating safety risks.

6 A work-week standard is being used that reflects neither the actual time sailors spend working nor their in-port workload - both of which have contributed to some sailors working more than 100 hours a week.

7 Ship maintenance cannot be completed on time. In fiscal 2011 through 2016, maintenance overruns on 107 of 169 surface ships (63 per cent) resulted in 6,603 lost operational days.