Are you looking for a system that will allow you to sail in shallow water without any worries? Or in areas with a lot of fluctuation in water depth? Do you want to be able to easily adjust the height of the propeller to the load factor? Or do you need a system that is resilient if the unit is grounded? In all these cases, a retractable rudder propeller is the ideal solution.
The hydraulic height-adjustable Hydro-Armor units combine the properties of a ‘retractable’ system particularly with the advantages of a hydraulic rudder propeller.
Please see below video for a short animation of the advantages.