Holland Marine Parts in Dordrecht, the Netherlands, manufactures the Jet Thruster. Owner-manager Henry Kroeze and Marketing Manager Pieter Cats are the familiar faces of the company. The Jet Thruster is a unique system that uses water pressure to easily manoeuvre vessels. It finds its way from Dordrecht to customers all over the world.
The current Jet Thruster has a comparatively short history, contrary to Henry Kroezes, who has over forty years experience in metalworking and plastic processing. In addition he has vast experience as an entrepreneur in the maritime sector. In this capacity he supplies, among other things, motor components to shipbuilders at home and abroad. One of Kroezes traits is that he never ever stops at half measures. He strives for perfection, and this was evident in the development of the Jet Thruster.
Development and Testing
Henry Kroeze: “I took over the product, the predecessor of the current Jet Thruster, in 2010. The idea and principle behind it appealed to me. I thought I should be able to market the product in short order, but first we set to examining and testing the system thoroughly. I was deeply disappointed with the results. So instead of marketing the product we started to systematically improve it. Our engineering department, assisted by outside help, scrutinised every part of the system. The pump, the impeller, the valves, the pipes, the control system… nothing has in fact remained as it was when I bought the product. All the materials our people had even the slightest doubt about we immediately replaced with high-quality alternatives, and while doing so we improved the entire principle. For instance, we removed the square curves and optimised the flow of the water, which is pumped to the outlet nozzles, by using a Y pipe.” Meanwhile we had invested in a testing facility in the form of a test tank and accompanying hardware and software. Only in this way could hard data be acquired, thus establishing the effectiveness of the system.