"Water Tight"

Material Condition Readiness for battle and weather conditions are set aboard US military vessels to maintain watertight integrity and readiness against various threats. There's Condition X-Ray, Condition Yoke, and Condition Zebra, all used to dictate how to "button up" ships.

The names of those conditions were derived from an old childrens' quip,

"XYZ— eXamine Your Zipper."

That’s what they told us in Bootcamp … True Story!!!