🔍 Key Concepts

• Class D fires (flammable metals like magnesium) and why water is usually dangerous on them • How water fog behaves compared to solid water streams when used on fires • Safety rules for using water near electrical equipment and energized circuits

💭 Think About

• Think about what happens when water touches burning magnesium or other metals—does it make things better or worse? • Ask yourself why fire teams prefer fog instead of solid streams in compartments filled with smoke. • Consider when it is safe or unsafe to use any form of water on electrical equipment—does fog change the basic safety rule?

✅ Before You Answer

• Identify which fire classes water fog is generally recommended for and which it is specifically prohibited for. • Verify if water fog can be used to displace smoke and heat from a compartment (ventilation effect). • Confirm whether standard maritime firefighting guidance allows any water pattern on energized electrical equipment.