54d ufo {Light sky, maybe} => {Sky light, maybe}. 55d DEA {Traffic group that may stop: Abbr.} => {Group that may stop traffic: Abbr.}. See DEA . 56d ESP {To know one way} => {One way to know}. 57d rte. {Offering G.P.S.} => {G.P.S. offering}. "route" abbreviates to rte. Image of