What is the advantage of using fire main over portable pumps?

The advantage of using fire main over portable pumps is that fire main provides a continuous water supply with higher pressure. This is crucial in firefighting scenarios where a sustained and reliable water source is necessary to combat fires effectively. Fire mains are typically connected to the ship's water supply system, ensuring that there is always a significant amount of water ready for use whenever needed.

In contrast, portable pumps may not maintain the same level of pressure or supply duration, as they rely on fuel or battery power, which can limit their operational capacity. Moreover, portable pumps must be set up and may require more time to become operational, which can be a disadvantage during emergencies when every second counts. Fire mains are designed to be operational at all times and can quickly deliver the necessary water pressure for firefighting activities, making them a more efficient choice in critical situations.