Compact,
hugely over powered for their size,
highly manoeuvrable,
can actually replicate the full size counterparts,
(unlike freighters, liners, trawlers, lifeboats etc.)
can have numerous working features,
(hooks, winches, sound, lights, etc)
loads & loads of different prototypes to choose from,
can be seen in most ports around the world doing that they are designed to do,
can be worked in competitions that mimic full size working practice.......