Emplacement Procedure
A location chosen for emplacement of the D-30 should be as level as reasonably possible. Firstly the carriage is raised via an internal hydraulic jack located under the cradle of the gun. Once the gun is at the required height the wheels are raised via the wheel lifting lever; this allows the two split stabilizer legs to be separated from the mono stabiliser leg and brought rearward into firing configuration.
The legs are then locked in place with locking pins. The carriage is lowered via the hydraulic jack so the legs touch the ground; integral stakes are then hammered into the ground. At this point the gun is ready for direct fire using the OP4 direct fire sight, or can be orientated and have its position fixed via the aiming circles for subsequent indirect fire using the Pantel sight.
Read more about this topic: 122 Mm Howitzer 2A18 (D-30)