Answer: aok

AnswerCrossword Clue
AOKProceeding normally
AOKThumbs up for John Glenn
AOK"Perfect!"
AOKFine and dandy
AOKNASA thumbs-up
AOKPerfect, at NASA
AOKNo prob, at NASA
AOKCopacetic
AOKPeachy-keen
AOKSuper-duper
AOKComment from a capsule
AOKJust ducky
AOKJust dandy
AOKJust fine, at NASA
AOKVerbal thumbs-up
AOKNASA's "Go"
AOKPeachy
AOKSpoken thumbs-up
AOKThumbs-up
AOKMission control go-ahead
AOKTotally fine
AOKThumbs up
AOKSpace-shuttle assent
AOKFine
AOKNASA assent
AOKFine, at NASA
AOKJohn Glenn thumbs up
AOKJust fine
AOKFine, at Mission Control
AOKJust peachy
AOKPerfect, as a rocket launch
AOKPerfect
AOKHunky-dory
AOKAstronaut's "fine"
AOKUnlike the Mars Polar Lander
AOKFine, to NASA
AOK"All systems go"
AOK"Good here, Houston"
AOKNASA's "fine"
AOKGood to go