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The results are presented from a technological experiment on computer-based digital transmission of Soviet satellite imagery via telephone lines from Moscow to Helsinki. The images have been used for real time sea ice mapping purposes.Particular features of the specific hardware and software are outlined. Time and cost values of the satellite data transmission via standard common-use telephone lines are given. The assessment for effectivity of experiment technologies for operational purposes in Finland is given. The system has been tested for aiding in the operational ice charting in the Baltic Sea. Also a particular test was performed in connection with the Finnish Antarctic expedition FI"ARPS9.Examples of transmitted images and technology exploitation features are presented. The ways to improve the telephone line image transmission technology are outlined. 829

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