type of oar act to reverse the direction of progress of the vessel, thus facilitating the implementation of the popular movements while maintaining the

摘要

type of oar permitting reverse the of the vessel while serving the movements typical of vogue.the reversal of the effect of motion of oar is obtained through five main devices. the device is bound to the vessel with the pin (2) and the device b with the couple rotoidale (3).the device b is implanted in c allowing for axial movement. the device c is bound to sliding sleeve. the device and is bound with a system link (5) d.the device d is linked to the craft with a link (4).the system, installed on vessels, is intended to facilitate the making and included the popular automatic inclinations shovels and factors of work.in addition, the progress of the vessel is in the direction of the visual field of the machine.