Wrecks and derelicts as hazards

Pollution of harbour beds and waterways by wrecks and other objects causes anchor losses, hull scrapings and impact damage.

1. Unidentified submarine objects
2. Solid waste in the oceans
3. Marine navigation hazards
4. Hazardous remnants of war

1. Corrosion of ships

1. Marine accidents
2. Dereliction of the built environment

1. Human destructiveness

1. Adapting underwater wreckage as marine habitats

1. Hazard