Vroon has won new offshore ship charters in Africa after work was halted by the Covid-19 pandemic.
The Dutch vessel owner said its teams started 2020 "filled with optimism, in a shipping market that looked to be emerging from its long slump".
"Unfortunately, Covid-19 and another oil-price crash brought fresh challenges throughout the year and it was hard to find an offshore drilling campaign that had not been postponed or cancelled," it added.
