A model of a submarine, 1:15 scale, is to be tested at 180 ft/s in a wind tunnel with standard sea-level air, while the prototype will be operated in seawater. Determine the speed of the prototype to ensure Reynolds number similarity. Use ν = 1.57 x 10^-4 ft^2/s for air and ν = 1.26 × 10^-5 ft^2/s for seawater.