The monthly loss marks a significant improvement on March's numbers, which showed $15.5m in red numbers.
Before reorganisation costs and income taxes, the tanker owner had $4.1m in income in April.
New York-based OSG, which is required to file monthly operating reports since filing for bankruptcy, reported operating expenses of $81.2m during April and revenue of $82.3m.
The company has spent $406m in reorganisation expenses since its bankruptcy filing and has logged a combined $627m in losses from vessel operating expenses.
The
