What Are Collision Regulations At Sea?

Collision regulations at sea, commonly known as COLREGs (International Regulations for Preventing Collisions at Sea), are a set of rules developed by the International Maritime Organization (IMO) to ensure safe navigation and prevent accidents between vessels. These regulations provide standardized procedures for vessel conduct, defining responsibilities and actions to avoid collisions and protect lives, property, and the marine environment.

Key Provisions of Collision Regulations

Conduct of Vessels

• Maintain a proper lookout by sight and hearing at all times.
• Proceed at a safe speed considering traffic, visibility, and maneuverability.
• Take early and substantial action to avoid collision.

Rules of the Road (Steering and Sailing Rules)

• Define stand-on vessel (which maintains course and speed) and give-way vessel (which must maneuver to avoid collision).
• Differentiate rules for power-driven vessels, sailing vessels, vessels engaged in fishing, and vessels restricted in their ability to maneuver.

Lights and Shapes

Specify navigation lights and day shapes vessels must display to indicate their status and activities, such as underway, at anchor, or engaged in fishing.

Sound and Light Signals

Prescribe signals for maneuvering intentions or warnings, especially in restricted visibility conditions.

Responsibilities Between Vessels

• Define priority in crossing, overtaking, and head-on situations.
• Require vessels to avoid impeding safe passage of others.

Special Rules for Restricted Visibility

• Require vessels to proceed at a safe speed and sound signals in fog, mist, or heavy rain.

Legal Importance

• COLREGs are binding international law under the United Nations Convention on the Law of the Sea (UNCLOS).
• Violations may lead to liability in maritime collision claims or penalties under national laws.
• Coastal and port authorities enforce compliance to ensure navigational safety.

Example

Two power-driven vessels are approaching head-on in clear weather:

• Both vessels must alter course to starboard (right) to pass port-to-port.
• If a sailing vessel is crossing a power-driven vessel’s path, the sailing vessel must give way.
• In foggy conditions, vessels sound fog signals and proceed at safe speed to avoid collision.