Dynaflow's underwater jet cleaning diver tool reduces propeller fouling removal maintenance time and without being abrasive to the propeller blades.


Dynaflow has successfully developed a second generation DynaJets Non-Abrasive Diver Tool (NADT) that is small, lightweight, quieter than other water jet cleaners, and very efficient. The NADT uses advanced resonating and cavitating jet nozzles in a rotating head housed in a shroud that protects the surface being cleaned and reduces the noise. The NADT was shown to remove propeller fouling including calcareous growth and hard and soft biofouling with no damage to the underlying propeller metal.

The NADT reduces the propeller cleaning time by half relative to abrasive brushes, which cannot be used on the edges, and does not damage the blade surfaces including edges and fillets. Field demonstrations performed on the USS Leyte Gulf (CG 55) and USS Cole (DDG 67) have confirmed the removal of soft and hard biofouling, including barnacle basal plates, and calcareous growth with no damage to the propeller surfaces. The NADT reduces the propeller cleaning time from 2-3 days to 1.5 days while preserving the blade edges.

The benefits to the diver are a zero-thrust counter thruster so the diver is not pushed away from the blade, lower ambient noise than other water jet cleaning tools, light-weight, neutral buoyancy, small tool head for access to tight areas such as hubs and fillets.