Chris 249 said..
The shape of most boards changed dramatically with wide style boards, which use the simple physical fact that a short and wide planing surface is far more efficient at planing speed.
The idea that the gap between the two “planing” surfaces won’t get in contact with the water seems to be very dubious in any chop.
These boards goes away from that. The style, incidentally, was tried about 1981.
What were those boards built from back in 81?