A stratified-random bottom trawl survey on Flemish Cap was carried out from June 2nd to July 27th 2003 following the same procedures as in previous years. However the survey was carried out by the R/V Vizconde de Eza, which will continue for this survey in the future. For this reason during the first ten days of the survey a comparative fishing trial for calibration was conducted between the former vessel R/V Cornide de Saavedra and the new one. Taking into account that the calibration will continue during the next year's survey, the indexes in the series from 1988 to 2002 were not changed to the new scale by now. Still, the 2003 current indices from the R/V Vizconde de Eza were transformed to the R/V Cornide de Saavedra scale, to make them comparable to the results obtained in previous years. Abundance at age indices was presented for cod, American plaice, redfish and Greenland halibut.