Re - There is a plan of a Fire Tug from Richard Webb
Doesn't say in the ad if it's a particular design Peter, but it was built by Whangarei Shipyards.
32.4m powered by Ruston/Paxman english electric engines of 1007kw ea (1350hp) Auxilliary power is 2x 200hp Caterpillars. Starboard engine had a PTO for a fire pump originally, but has been decommissioned. Pic of Kupe with fire monitors originally. Was a Wellington Harbour tug, then sold to port Taranaki. Whangarei Ship Building made 2 the same (delivered 1971 and 1972)
They have built a number of tugs, ferries, landing barges and naval vessels etc over the years.
Kupe was replaced in 2018 by a Turkish built tractor (pic) Voith system pic is of Toia, the sister ship.