According different online sources, it was described as
I have seen multiple different dates indicated as 23, 27 or 28 July 1942, and a generic ""West from Hanko peninsula"""A little Finnish motor boat, used by the 4 minesweeping flotilla as minesweeper was sunk by a mine, 3 sailors killed
There are more specific Finnish data over this loss? the exact date and coordinates to attept identify the field etc