Here is one way that a back-up man can take pressure of the pipeman:
The back-up can be about an arm and a half length behind the pipeman with the knee closest to the hose up, supporting the hose. Grab the hose with the arm closest to the hose and run the hose under that arm pit. Put the elbow of the hose arm against your inner thigh. Outstretch the other arm and grab the hose near the pipeman, now slightly lean forward.
In navy a man is right behind nozzle man with one hand on hose and other hand bracing the nozzle man, this was also true for Moores mill vfd and the Gurley vfd when I was with them and enough personnel was available if not one was ssome time told to circle hose on ground an have nozzle go under where hose crossess and sit on it and fight defensively.
What you said was very informational, but what I am looking for is ways to take the load off of the nozzleman while advancing the charged line. Thank you for your input.