The International Maritime Organization (IMO) establishes global standards to promote safety, protect the marine environment, ensure proper training of seafarers, and safeguard their welfare. These standards are anchored on four key conventions known as the 4 Pillars of IMO:

1. SOLAS – Safety of Life at Sea (1974)
SOLAS is considered the most important international treaty concerning maritime safety.
It sets the minimum standards for the construction, equipment, and operation of ships to ensure they are safe for both crew and passengers. This includes:
• Fire protection systems
• Life-saving appliances
• Navigation and communication requirements
• Emergency preparedness

Its ultimate purpose is to prevent loss of lives at sea.

2. MARPOL – Marine Pollution (1973/1978)
MARPOL addresses the prevention of pollution from ships. It regulates:
• Oil and chemical spills
• Sewage and garbage discharge
• Air emissions from ships

Its goal is to protect the marine and coastal environment by minimizing pollution from ship operations and accidents.

3. STCW – Standards of Training, Certification, and Watchkeeping for Seafarers (1978)
STCW sets global training and competency standards for seafarers working on commercial vessels.
It ensures:
• Seafarers are properly trained, qualified, and certified
• Uniform watchkeeping and operational safety practices across the world

This helps maintain a high level of professionalism and safety at sea.

4. MLC – Maritime Labour Convention (2006)
The MLC is often called the “Seafarers’ Bill of Rights.”
It ensures that seafarers have:
• Fair wages and employment contracts
• Safe working and living conditions
• Adequate rest hours
• Medical care, social protection, and welfare

The convention promotes human rights and dignity for those working at sea.