The Matisa BNR-60 tamper was a B-60 tamper as described here with additional equipment added.
This consisted of a four-wheeled trolley that was pushed along in front of the tamper by a lightweight beam and electro-mechanical means of computing the geometry. With the beam and trolley removed, the tamper reverted to the B-60 specification and could be used in the same way. The beam and trolley, in effect, increased the length of track being measured to about 30 metres giving greater accuracy.
For maintenance purposes, where the track was already reasonable, this gave near-perfect level and alignment automatically and was much faster than using the telescope and target method. Also it needed only one operator
The setup was very robust because if there was an accident involving damage to the trolley, beam or other mechanical structure it could be straightened, welded or otherwise fixed and the more delicate electro-hydraulic controls reset.
Although the BNR-60 setup was initially seen as essentially for maintenance use it proved to be very useful when laying new track or doing high lifts and saved much painstaking work with the telescope and target.
