Of Mamutu 's 142 passengers and crew , 114 were lost .
The Japanese submarine RO - 33 sank the 850 - cubic - metre ( 300 grt ) MV Mamutu by gunfire on 6 August 1942 , and machine gunned survivors in the water .
Of MV Mamutu 's 142 passengers and crew , 114 were lost .
The Japanese submarine RO - 33 sank the 850 - cubic - metre ( 300 grt ) MV Mamutu by gunfire on 6 August 1942 , and machine gunned survivors in the water .