LDOs need their Good Conduct ribbons each individual little bit as much as Linus requirements his stability blanket. Even while an LDO can pick to use only his/her major 3 ribbons, they never ever do for the reason that they generally have at the very least a few larger than Good Conduct and they need to have that a single on exhibit lest they be mistaken for a actual junior officer. LSO: Landing Safety Officer or Landing Signals Officer.