The Italian Sub Reginaldo Guiliano arrived in Singapore late in summer 1943 was captured by the Germans and renamed UIT23 . This craft manned by a crew of Germans and Italians was sunk in the Malacca Canal by the British submarine Tally Ho on 14 Feb 44 off Penang, Malaya.

She had been stripped of all fighting equipment and turned into a cargo sub by the Germans to secretly smuggle goods from Asia back to Germany. http://www.german-navy.de/kriegsmarine/articles/feature3.html

Her exact loctation uncharted we found her by sidescanning. She was found lying in 55m of water a long way from her approx reported position.


I suspect looking at the photos that as well as her fighting gear she was also stripped of all her deck and non essential fittings so as to increase her cargo load capacity.