Damen Marine Components (DMC), part of Damen Shipyards Group, announced it has smashed its propeller nozzle world record by 33 percent downwards. This downsizing to an inside diameter of 665 millimeters only - from the previous 1,000 mm âentry level modelâ - marks a new milestone for DMCâs Optima Nozzle series. Already one-third smaller than the previous one meter (1,000mm) Benjamins, the new 65 centimeter nozzles are, however, dwarfed altogether by the biggest models in the Optima series. With their 8 meter inside diameter, these exceed the two 65 centimeter ones twelvefold.