Defending champions Brooke Donoghue and Olivia Loe have made a powerful start to their Rowing World Championships campaign in Bulgaria.

The duo have clocked the fastest time in the women's double sculls heats to progress to the semifinals.

The New Zealand women's four finished third in their heat to reach the semifinals but single sculler Hannah Osbourne faces a repechage after finishing third in her heat with only the heat winners advancing directly through to the semifinals.