DIVING TASK Underwater Services Hong Kong carries out underwater maintenance of Bow Thruster includes the following steps:

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• Check the Bow Thrusters compartment for moisture and water leaks, causing rust.

• Engine and engine part inspection for corrosion.

• Cleaning the power supply unit.

• Bow Thruster shaft test for cracks.

• Cleaning inside the tunnels, propeller from marine organisms-growth or human activity waste.

• Propeller control for cracks or knocks or cavitation.

• Propeller Inspection for loosening and leaking oil on its shaft.