Tank testing of the 9.95m at GKN Westland Aerospace. Tank testing helps to establish hull resistance, trim angles and wash characteristics under different loads and speeds. It also helps to establish outer chine slope critical in keeping spray to a minimum giving a comfortable and dry ride. Look at the way the water acts in the tunnel with the centre wave break on both the model and the real thing. The combination of the hull shape and the wavebreak creates the soft cushioned ride.