The theoretical background, types of SLAR (Side-Looking Airborne Radar) systems with their specifications, properties and limitations are described in par. 3.1 to 3.8. Based on properties, costs and operational requirements the real aperture X-band and/or 0-band SLAR should be given primary consideredation with a certain preference for combined use The r.a. X-band SLAR used during the sea ice experiments has certain specific limitations. These are discussed in par. 3.9. In par. 4 the SLAR images are interpreted; these were obtained during survey flights over the Bothnian Gulf. Actual interpretation is based on a comparison with aerial photographs, taken during the same period. Some typical reproductions of SLAR images are used to illustrate the text Conclusions are also drawn up.The project leaders defined a number of specified items to be separately discussed in individual reports. This discussion regarding SLAR is covered in par. 5. This shows that while SLAR is an adequate primary sensor for an ice surveillance system due to its inherent capabilities, some natural limitations are present. In par. 6 some additional remarks are made. This shows basically that in practice there is no sensor which will adequately provide all the answers. Other sensors needed to back-up an operational system are referred to.