Cavitation in marine propellers has adverse effects such as noise, erosion and vibrations which result in loss of lift and increase in drag. The radiated noise level of any form of cavitation is of the order of magnitude higher than the noise level of non-cavitating flow. This is used by navy ships to detect and locate other ships. Cavitation has to be discouraged from stealth point of view. Generally marine propellers are made with NAB. The NAB propeller can be replaced with the composite propeller which has intrinsic bend-twist coupling for performance enhancement.