We did this with our kids - simply clip the pole on in the normal fashion at the highest point and guy it aft so it's nearly across the beam of the boat. Tighten the lift and downhaul to stabilize the pole as much as you can at the best height.
Run a rope halyard, or tie a line, to the end of the pole and use it as a "swing". The kids can spash off the line, swim round to the ladder and go again. Good amusement for many hours on a hot day.
As far as an adult doing this, on a boat your size you'll find that everything "gives" a bit more to your 190#s and things jump around quite a bit. You may not be comfortable doing that to your rig.
If your attachment point is too low, add another pole eye higher up or go to a dip-pole style track arrangement.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"