The present invention relates to a linearisation method and signal processing device for reducing intermodulation distortions by extracting harmonic components generated from first and second carrier signals with different carrier frequencies, which are input into two first non-linear stages. The amphibious yacht includes a continuous reveal on the hull bottom from bow to transom that separates two asymmetric catamaran hulls. The guide component is mounted displaceable in a receptacle of the housing. The blinder portions preferably include surfaces that are inclined to generally extend along the light cone generated by an LED light source mounted to the front end portion of each of the temple arm members.