Weak Bow Thruster

Hi there, so in November's issue of Motorboat, on page 80, there is a new jet system that is a third of the price of a bow thruster. It is claimed to be better, more efficient, cheaper to maintain and a DIY install.
I seem to remember vetus did a water jet bow thruster years ago. Didn't stay on the market long.
It's a bit like a water hose. Out of the water it seems to have a lot of force. In the water the force disappears.
 
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