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AbstractWhen several seismic crews are active in an area it is common for each crew to acquire data only within an agreed time-period, in order to avoid generating shot-noise that might interfere with the other crews. Unfortunately, timesharing of this sort can considerably increase the cost of 3D seismic operations, and can also lead to significant delays in survey completion.In this paper we present results from a simple alternative approach that can do away with the need for time-sharing. We propose to use location and shooting information from each seismic vessel to predict the arrival time of the interference noise in the seismic records. Once the arrival time is known, a variety of standard data processing techniqueswindow edit, FK filtering, pattern removalcan be used to automatically locate and remove the noise.We will show examples of this approach for noisecontaminated data from the Southern North Sea and from the West Shetlands. The examples contain interference noise with very different characteristics, due to the different waterdepth in each area. Nonetheless, our approach is capable of successfully removing the noise in either of these cases. Furthermore, the noise elimination occurs without any significant loss of signal, a problem which can arise if random noise attenuation techniques are used to attack this type of noise.We propose that the co-operation that currently exists between crews working in a common geographical area should be extended to include an exchange of vessel coordinates and shooting times between the crews; in other words, we are proposing sharing co-ordinates rather than sharing time. With this information we believe that it is possible to obtain a close to zero time-sharing solution to the problem of seismic interference noise.