There has been a collision between a passenger train and a goods train. There are a large number of serious casualties and there has possibly been a spill of an unknown industrial chemical.

1. State the seven components of the structured method of communicating to central authorities. 7 marks

2. Define each disaster zone and outline the roles or tasks typically carried out in each zone. 6 marks

3. List three advantages of sieve triage over sort triage. 3 marks