The jet Props were shaped like the boat propellars, but made of stainless and alloys harder than steel..Nothing like the caged type impellars on a Berkley jet boat...The Knifes on the bottom suction plates were stainless alloys and sharpened like knifes to prevent clogging and damage.The Boat could pull itself off of sandbars, by closing the reverse gates and full throttle reverse washing the sand away..There was one scene of it in Ap redux movie, boat in ambush. Checkmate boats were very tough with the balsa block bottoms in glass, my bud had one with 150 black max..My 140 Evinrude ran a SSt prop with tilt all the way up, but i could not make myself buy the jack plate and skinny lower units.I loved watersking in my prime..
.But back to pbr, tough boats..like guys riding a surfboard with guns..