The purpose of this work is to address the problem of detection in an inhomogeneous environment with clutter distributed in a homogeneous way for two types of detectors the OS and the ML-CFAR. The clutter is assumed to be a sea clutter represented by a Weibull distribution. In order to determine which detector is the best, a comparison was made for several parameters by simulation related to the variation of the signal-to-clutter ratio (SCR) and some cells N and the probability of false alarm also for different values of the shape parameter c is known or unknown. The results show that the ML-CFAR detector improved performance over the OS-CFAR detector.