Casper... foaming the handle simply keeps it "upright"... stands up on its own... if you let go of the scoop it wont lay down to bottom and saves ya from bending and groping in non viz.
I know... the way i hunt - i like to lay it down in certain areas and in certain situations - if i "foamed" it = i would lose that option
I usually will not stand upright in knee deep water or waist deep water
I will lay out and place scoop on bottom in my left hand and pull myself along the bottom ...that would be difficult if handle wanted to keep rising
also have been times when i needed to keep my machine on the bottom and will lay scoop across it to keep it there
I very rarely come across many non-viz spots - 99% wear a mask
our fresh water spots are clear and most of my saltwater ones are too - if i drop it i usually just lift it up with my foot
I had a target in Dom. Rep. that ended up being inside a dead reef - The signal kept reading over a flat part of a dead reef and and saw
a hole about a foot and a half away and wondered if target could have sank inside it and worked its way under the shelf - hole was filled with soft powder sand
- I had to lay my machine on the bottom and lay scoop across so i could hold onto the lip of the hole and fan with my other. My machine would have floated away
if i had to do it any other way - scoop might have too if "foamed" - long story short - i fanned all the way to the back of the hole - came to the surface and took
another breathe and went back under - i looked in and saw nice gold band wedged in the back with pieces of coral and broken shell - reached for it but could
not free it - got excited - i was only like 4 ft under the surface but felt like I was hunting 20ft on a ship wreck. Took one more breathe and went under again
and fanned hard and then wiggled it free - nice 18k band - Reason # 5 i wear a mask. Without a mask no one wouldve gotten it and even with a mask
-i think others would not have tried or may have given up on it thinking it way a sinker trapped in the coral.
I have had other situations where i needed my hands free and have done the same.
To each their own - what ever works for you
