Due to a boat's movement forward and sidewards, water is not properly passing the tunnel along the hull and, instead, is pushed into the tunnel. A spinning bow propeller is then giving an unpleasant sound down below which could be heard in the entire boat and hence increase drag. Learn more......
Tailor made nostrils are being cut out
Cutting out the right forms for the deflectors
The deflectors taking shape and being covered with GRP
The ready deflectors pushing the water sideways and past the tunnel, reducing drag and noice inside