It’s been 99 years since the U.S. Navy banned alcohol on its ships, and now all ships and submarines are getting breath-test machines, according to the Washington Post.

About one-sixth of those who report for duty will get an automatic breath test (the commonly used term, Breathalyzer, is a brand name), and the Navy will also conduct random testing, the newspaper reported. 

The alcohol testing is part of a broad program designed to help service members cope with the “stresses of a decade of war.” 

Navy Secretary Ray Mabus told sailors this week that the move isn’t meant to discourage them from drinking (as long as they’re of age): “We are telling you that it is important to keep legal, responsible use of alcohol from turning into a problem,” Mabus said, according to the Washington Post. 

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