The system utilises the proven reliability of the scorpion wall crawler with an added transverse scanner fitted to the front end. The scanner covers a 130mm wide strip at the speed 600mm/sec. The adjustable scanning head allows inspection of small vessels and pipes with a minimum diameter of 1m. This technique meets or even exceeds requirements  of the relevant inspection standards without the need for scaffolding. Stored data can be viewed as either A,B or C scan.