As far as I know, the old laser scan tech usually placed stationary while scanning in 360 degree, it's not as advanced like today tech, so it may scan in chunks, say 50m radius

Regarding accuracy of 5mm in 50m distance that I wrote, different distance scan yield different accuracy, I may have mistaken with 5mm, it may even be 15mm or 25mm at that distance. It's been long time, I read about it in college, but I can remember in early 2002 or 2003, there's one claimed that 5mm accuracy, it was Trimble as seller.
Oh, the mid 90's maker of laser scan was Callidus, I may have mixed my statement with Callidus CP3200, that's what I remembered. Trimble sold Callidus made scanner.