Synthetic aperture radar X band images collected over the North Sea during the 1979 MARSEN experiment show numerous apparent point scatters imaged with a degraded resolution in the along-track direction. The observed resolution of these features is consistent with a scatter coherence time of the order of 10-2 s or a vertical acceleration of the order of 5 m/s2. Observations of the resolution as a function of the processor integration time tend to support the coherence time explanation. Similar coherence times have been measured for breaking waves by conventional high-resolution radars suggesting that the same phenomena may be responsible for the features observed on the synthetic aperture radar imagery.