This is a working model of one of the machines I operate at work.

http://www.crisafullipumps.com/products-services/dredges/rotomite-6000/

(Also my first beta creation)
It's a dredge, we make lakes, rivers and reservoirs deeper with it. In the real world it weighs 18 tons and doesnt go over 15mph. So keep that in mind when you go screaming across the ocean.
•VTOL controls boom up and down
•Pitch controls auger rotation
•Roll controls the rudder
•Prop is auto-trimmed with the throttle

I am aware that the prop only provides thrust in one direction. However it was necessary for the replicas sake and it's honesly still a little too fast for its own good.
I work in and on the water, so here's hoping the Devs are already working on a real boat prop.