Water Sources
Drop Tank
A drop tank is a portable open container set up near the fire that tankers dump into and the attack engine drafts from. It is the hub of a tanker shuttle, decoupling the haulers from the pumper.
By dumping into a drop tank, a tanker can unload quickly and return for more without waiting on the attack engine. The pumper drafts from the tank continuously, so the supply stays steady even as individual tankers come and go.
The drop tank turns intermittent loads into a usable reservoir. Its level is the visible buffer between the shuttle's delivery rate and the attack's demand — let it run empty and the attack outruns the supply.
Where this shows up
Calculator
Tanker Shuttle