I have downloaded a bathymetric dataset from this web site (http://portal.emodnet-bathymetry.eu/#) in GeoTIFF format. It uses GCS_WGS_1984 coordinate system.
I have to make the dataset match the coordinate system of a DTM I have, which uses European Datum 1950, UTM 33N. In ArcGIS (10.1), I tried the 'Project Raster' facility, but it does need me to specify a geographic transformation to be selected from a drop-down menu. There seems to be no transformation suitable from the task at hand.
How can I project the bathymetric dataset to match the DTM, given the absence (in ArcGIS 10.1 at least) of a suitable transformation?