A high board is a fixed platform high above the water. Jump from the high board.
The Olympic one is ten metres, and a diver hits the water at about fifty kilometres an hour. The high board is rigid where a springboard bends, which is the whole difference.
1nounhigh boardA fixed platform high above the water.
“It took him three summers to jump from the high board.”
high board is a platform.
Practised in Swimming & Diving