The Navy allows ships to rely on grueling watch schedules that leave captains and crews exhausted, reports The New York Times.

The bridge of each Navy destroyer is controlled by a round-the-clock shift of young officers, who must pass written and oral exams to qualify for the positions. Still, they typically are under 25 and may have little shipboard experience. Junior officers also move on to other assignments after limited tours.

“Are we shortchanging their basic training, especially as we rotate our junior officers whose tours aboard ship are nominally 24 months?” Admiral Crowder said.

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