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generated by the nozzle in the design condition. This potentially allows the use of a nozzle over a wider speed range and thus greater applicability to vessels other than tugs.

And the nozzles aren’t the only com- ponents in these systems that have been improved in recent years. Propel- ler designs have also advanced, espe- cially with regard to cavitation and vi- bration mitigation for ducted systems.

In cases where unsteady cavitation can be problematic, often times resulting in potential vessel vibrations, the use of skewed blade designs has been very ef-

Stop Abrasion Now.

fective. The evolution of these systems has gotten the attention of operators

Leading The Way For A Quarter of a Century that stand to bene