Hi, at the U-boat Archive website there is a set of pages on torpedo firing technology and terminology. General information can be found at [uboatarchive.net] and specific information on firing reports with examples can be found at [uboatarchive.net] I hope that these pages and the other Note pages accessible from the main KTB Project page [uboatarchive.net] help with your translation. All the KTB Note pages are works in progress as we learn from each KTB we work on. If you have further questions after you have been through these pages, don't hesitate to ask. Cheers, Jerry