1. Method of detecting a target in a sea area based on a Synthetic Aperture Radar (SAR) image thereof, the Synthetic Aperture Radar (SAR) image made up of pixels, each having a respective magnitude, the method comprising: computing a first reference quantity characterizing a Poisson distribution assumed for the magnitudes that the pixels in the Synthetic Aperture Radar (SAR) image would have if the sea area were free of targets; selecting pixels in the Synthetic Aperture Radar (SAR) image; computing a real quantity characterizing a real statistical distribution of the magnitudes of the selected pixels; and detecting a target in the sea area based on the computed first reference and real quantities.