Recently we received an order from Visscher Ship Repair B.V. to overhaul a Masson RSY 200 twin-in single-out reversing gearbox. The inland dry cargo vessel the Alm underwent a major survey, replacing the two diesels for new modern CCR2 emission D13 engines from Volvo Penta. After the overhaul the gearboxes is test thoroughly on our in house testbed. The trial will take place shortly. The Masson RSY type reversing gearboxes are unique in their power range. Two engines can be connected who can drive the propeller together or separately. In this way the captain can run with the right power for various sailing profiles.