Good point Devil Dave. You touched upon a subject that I have always felt very strong about. What is a good climber without a good goundman?
The Davey Tree Experts definition of a groundman is, "A common laborer who performs menial tasks." Right out of their Book! Least during my tenour during the 80's. They may have changed by now.
My definition of a groundman comes from a short paragraph entitled, "Working The Hole."
"As a ground man working the hole your duties will include the tending of the lines; pulling, holding and lowering. You will also have to clear the hole so more work can come down, an arduous task in tight quarters. You'll have to refuel, sharpen and maintain the power saws. You'll use knots and fasteners, and you may even be required to do some "on the spot splicing" to keep the job going. You'll be in the position to call how large a cut the climber takes, and the climber will be relying on your good judgment to manage it after it has been cut loose. Working the hole can be fun and exciting, but it can also be difficult and dangerous. To keep it safe, remember to have a good plan, adequate tooling and training in the prodedures of working the hole."
Page 27, "The fundamentals of General Tree Work.
I've known people that had not the nerve to climb, but were excelent ground men. Un surpassed in their ability to think ahead of the climbers' needs.