The report includes a proposal for a fire test method aimed for testing water based fire protection systems to be installed on vehicle decks. The test method simulates conditions and fire scenarios likely to occur on a vehicle deck, such as flowing petrol fires and fires in the cargo of a lorry. An acceptable fire protection system should be capable of suppressing fires in flowing petrol, preventing fire spread from the vehicle of fire origin and reducing the temperature of exposure from the fire on the structure of the ship, to an acceptable level.