concaves?

i am a beginner shapper and i was wondering about what the difference in bottoms of boards does? what is the difference between concaves, double concaves, and v-bottoms? what do they do to the performance of the board.

i am a beginner shapper and i was wondering about what the difference in > bottoms of boards does? what is the difference between concaves, double > concaves, and v-bottoms? what do they do to the performance of the board. from what i was told and i only got my board yesterday. the concaves make the water travel through the board and not out the side. allowing it go go faster. my board should be posted in the gallery in a few days look under 6 - 6’11" for 2002 hohensee and you will c the specs of my board