Laying is the act of making equipment level. It usually involves moving equipment in small motions so that
spirit levels are centralised in all
plane
Plane(s) most often refers to:
* Aero- or airplane, a powered, fixed-wing aircraft
* Plane (geometry), a flat, 2-dimensional surface
Plane or planes may also refer to:
Biology
* Plane (tree) or ''Platanus'', wetland native plant
* Planes (gen ...
s. Movement is usually done by small
worm gears or other fine setting devices for accurate small movements, together with coarser gears to allow large swings in motion for quick movement between different settings.
Equipment that requires laying before it can be used accurately includes:
*
theodolites
* guns and howitzers in
indirect fire (
gun laying)
Artillery operation
Machines
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