- A comprehensive set of basic maritime labour principles and rights
- Simplification of international requirements
- A strong enforcement regime, backed by a certification system
- Verifiable compliance with basic minimum employment and social requirements
- Application to all ships including those of non-ratifying Members
- Improved working and living conditions for seafarers
- A more secure and responsible maritime workforce
- A more socially responsible shipping industry
- Improved social dialogue at all levels
- Seafarers better informed of their rights and remedies
- Improved supervision at all levels: the ship, the company, the flag state, the port state, and the ILO
- Global and uniform compliance and verification
- Improved possibilities of keeping labour conditions up to date
- Permanent review of maritime labour situation
- Positive impact on safety at sea
- Positive impact on the protection of the environment
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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