I started this quite a while ago, ideas came from model boats mag.
A fun boat for my grandson.
With no plans had to scale , etc from photographs.
Build was using plywood from an old wardrobe ( this is built out of the best of birch ply of various thicknesses.
I fitted twin prop and rudders (not shown) however changed direction after viewing a different configuration.
More info later

i had the props when i saw a build using jet drives.
Wow , more like the real thing. Found them on ebay from china at a good price.
removed the props and rudders, patched up the holes and fitted the jet drives using the motors i was going to use for the project.
Had a few problems with leaks however now fixed.
Bath test looks promising.
Paint job as per Malaysian Police.
A bit different.

Using bits from a cheap self driven hoover bought by a friend from Wish.
Total useless as a hoover but bits great for radar , flashing leds and battery.

The nozzel size is 20mm.
Other sizes are available.