| 摘要 |
The device (2) has an assembly comprising a group of wheels (33) assembled on a support that is assembled in a bow area of a boat i.e. rigid hull (1). Another assembly comprises a driving wheel (43) mounted on another support that is assembled in a rear area of the boat. The assemblies are assembled in the bow area with a port and a starboard to place the wheels at a front end. The assemblies efface to leave free a hull of the boat for navigation purpose. A control unit (5) controls the driving wheel. Independent claims are also included for the following: (1) an initial adjustment method for allowing watering and water outflow by a watering and water outflow wedge in a boat (2) a harbor installation for receiving boats, comprising a holding unit. |
