X-band radars are widely used for shipborne navigational aids and vessel traffic management systems. As for the radars operated on such high frequency, targets are likely to be obscured by the clutter signals scattered from sea surface, rain and snow. The scan-to-scan integration-correlation processing is one of the most effective techniques to enhance the target signals obscured by the clutter signals; however, the processing inevitably suppresses moving targets as well as the clutters. JRC has extended the conventional scan-to-scan integration-correlation processing to accommodate moving targets and also to achieve higher suppression against clutters. The new method evaluated on a real data has demonstrated the signal-tonoise ratio-improvement 8dB higher than the conventional method, for a fast-moving target under strong clutter environment.