On 3 August 1918 he sailed from Zeebrugge for the last time. The last contact he made with the base was on the evening of 14 August as "UB-57" was homeward bound roughly in the area of the Sandiette Bank, east of the Strait of Dover. Nothing more was heard. Lohs and 33 men lost their lives."UB-57" is believed to have run onto a mine. Lohs' body washed up on shore a week later and he is buried in the military cemetery at Vlissingen.