The RAscal Class tugs are a series of high-performance but relatively simple line handling tugs, all less than 24 metres in length. These tugs can be either Z-Drive or Twin-Screw configuration, and are identified by their length and propulsion type; e.g. RAscal 2000-Z (20 metres, Z-drive), or RAscal 1800-T (18 metres, Twin-Screw)

Currently the following designs exist or are under design development:

RAscal 1800-T	under development
RAscal 1800-Z	under development
RAscal 2000-Z