An experimental investigation of rigid flat-bottom body slamming was performed at the David Taylor Model Basin by dropping a 20-in. X 26.5-in. X 0.5-in. steel plate from various elevated positions above a calm water surface. Because of the effect of the trapped air between the falling body and the water, the maximum impact pressure measured was much lower than the pressure expected, if the generally accepted acoustic pressure formula ρcV0 is applied.

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