Answer: aliners

AnswerCrossword Clue
ALINERSSurveying telescopes.
ALINERSTelescopic contrivances.
ALINERSStraighteners.
ALINERSTelescopic sighters: Var.
ALINERSSurveying devices
ALINERSTelescope devices
alinersALINER, one that alines (to arrange in a straight line)
alinersalign