This model is a 1/24th RMAS single unit tractor tug, notice the Voith Schneider drive unit!
She is a powerfull little beasty for 29 inches.
These tugs are used by the British navy for shoving and shunting ships around moorings etc and are mainly used in harbours.
Thia one is a refurb, the origional boat was built 14 years ago and I hope she looks brand new again now?
I hope to hear from you soon.
Take care and bye for now, Paul...

voith-Schneider-24-ps