 Seahorse , a British submarine , later fired on U @-@ 36 and subsequently claimed to have sunk her , although in fact the torpedo missed . On 27 September Fröhlich and his crew captured another Swedish vessel , Algeria , which he proceeded to escort back to Germany as the patrol came to an end . She returned to her berth in Kiel at the end of September , where she remained until December . During her first patrol , U @-@ 36 was also credited with having laid the mine that sank the Norwegian freighter , <unk> . 
