Answer: pathfinders

AnswerCrossword Clue
PATHFINDERSAllied air raiders' guides to accurate bombing.
pathfindersAn experimental plan or forecast
pathfindersA person who goes ahead and discovers or shows others a path or way
pathfindersPATHFINDER, one that discovers a way
pathfindersAn aircraft or its pilot sent ahead to locate and mark the target area for bombing