Remember when Yuu got in that "small" friendly fire incident with Japanese ships?
Well... apparently, Etorofu was one of them.
Comraaade.Comraaade...?While on her way to Japan, U-511 was mistaken for an enemy and was investigated by Etorofu.
July 29, 1943: Convoy HI-03 bound for Singapore stumbles onto U-511; tanker Omurosan Maru fires at the submarine until the mistake is cleared up. The skipper of Etorofu inspects the submarine then personally apologizes.