Hi Guys, many thanks for the reply, as you say there are quite a few different sites on the WWII U-boat war with many record sources being searched through. As you point out one can only make a decision on certain causes of loss by the data they have at hand until definite evidence is revealed. Regards John [PS If I may would you know if there any record of U242, U275 and U480 being given a [Posted missing effective from date] by BdU,? or was their loss too late in the war for that to happen. John