Otherwise the method would return false indicating the View s are layed out in ascending order.
Our run is against the house and has a sloping roof, made of wooden beams with polycarbonate roofing layed on top.
Minor improvements in tangent sights certainly were made, notably an automatic clamp, but quadrant elevation was mainly used, and in the case of guns equipped with position-finders (see Range-Finder) the guns could be layed for direction by means, of a graduated arc on the emplacement and a pointer on the mounting.
This was of wood; the third sight, also of wood, was for guns without a dispart patch, which consequently could not be layed at elevations below the dispart.
This enabled the gun to be layed from some little distance behind, so that the layer could be clear of recoil, and continuous laying was thus possible.