- Check paintwork is completed.
- Hull repair is completed.
- All Tank plugs are in place.
- All Anodes are fitted, grease/paper used to cover them during painting is removed.
- Echo Sounder Transducer is cleaned of paper & grease.
- Propeller rope guard is fitted properly in place.
- Oil is not leaking from stern tube.
- Propeller is free from paint & free from any other object.
- Check freedom of movement of rudder with steering gear, smooth movement.
- Jumping & Pintle clearances taken.
- Rudder plugs are in place.
- Sea Grids are in place & secured properly.
- Ensure all sea v/v's are shut.
- Ensure all tanks are at same level as when entry
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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