Windsurfing: The large, pivoting and removable 'fin' in the middle of a long or mid-length board. You use your foot to lower or raise it, lowering it in light winds or when sailing upwind, to give greater stability and lateral resistance, but offwind when sailing at speed you pivot the daggerboard back so it retracts into the hull, as the extra lift it creates makes the board difficult to control at high speeds.
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Sexual Intercour...
Daemon
Dalton's Law Of Multiple Proportions
