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BORESIGHTS FOR MORTAR (LDB M120)
The sight is used to determine the deviation of the parallelism between the axis of the tube of a mortar (81 LLR F1, 120 RT or smoothbore) and the goniometers that can be fitted to this equipment (GP2M 120, GP2M F1). It can also be used to harmonize the dovetail supporting the aiming goniometer.
This angled telescope is mounted directly in the mouth of the mortar and takes its geometric references from the bore of the tube and from the plane of the tube entrance. The earth reference is obtained by positioning the bubbles of the different levels between their marks. The mirrors of the levels and the position of the telescope allow this calibration to be carried out by the operator on the ground. This ergonomic solution makes operators safer by eliminating the risk of falling.