The RAscal Class of compact tugs, exclusively developed by Robert Allan Ltd., addresses the challenges of modern, high-performance Z-drive line-handling and smaller ship-handling requirements. The RAscal 1500 design is a high performance, twin Z-drive, diesel-powered line-handling tug, designed for maximum efficiency in the performance of line-handling, ship-handling and related terminal support activities. The vessel is equipped with heavy bow fendering for ship-assist work. An aft staple and tow-hook are fitted aft for line-handling and general towing duties. The hull, deckhouse, and wheelhouse are of all-welded steel construction with scantlings in excess of the minimums of any Classification Society.