What command is given from the base mortar to begin the reciprocal lay process?

The command "Aim point this instrument" is pivotal in initiating the reciprocal lay process in mortar operations. This command directs the base mortar to set their sight on a specific predetermined point, allowing for accurate alignment and adjustment of their fire control system. It effectively shifts the focus from the original target to a reference point that facilitates smooth communication and coordination with other units, ensuring they understand the required angles and azimuths for their own firing positions.

In the context of reciprocal lay, this command helps synchronize the actions of both the base mortar and the observing unit, as establishing the aim point is crucial for accurate targeting. By aligning on this point, the mortar crew can calculate firing solutions that will allow for effective engagement of the intended target.

The other commands have specific roles, such as moving to a target or indicating readiness to fire, but they do not initiate the reciprocal laying process, which relies primarily on establishing the aim point for accurate mortar placement.