435. A large fire has developed in the HFO centrifuge room accessed by door «E». You should __________

With a large, developed fire in a machinery space, the priority is to prevent fire spread by removing combustibles from adjacent spaces while maintaining compartment integrity. Opening doors or increasing ventilation would intensify the fire, and immediate hose team advancement without preparation is unsafe. This action aligns with established firefighting doctrine and regulations emphasizing exposure protection and compartment containment.