Abstract: A steering structure for a ship propelling device includes: a support member for supporting the body of the ship propelling device on a hull; a universal joint for connecting between a drive shaft connected to a drive source and an input shaft of the ship propelling device; a vertically driving means adapted to cause the body to vertically pivot about a pivot shaft; and a turning driving means adapted to cause the body to pivot about an axis orthogonal to the axis of the pivot shaft. The vertically driving means and the body are connected together through a link mechanism. Such arrangement makes it possible to turn the whole of the ship propelling device independently of any vertical movement thereof, contributing to reduction of the production cost and a stable steering operation of the propelling device.

Abstract: A lumber work boat provided with an operating arm assembly at a bow portion of the boat for gathering up or moving lumber floating on the water. The boat has a recess to be opened frontwardly of the bow so that the operating arm assembly may be received within the recess, the assembly being driven by a drive mechanism disposed within the hull of the boat to transmit operating force to the operating arm assembly. The arrangement permits the entire work device to be positioned at a level lower than the upper deck, thereby providing a small type hull and enhancing mobility, while the operating arm assembly is protected since it is received in the recess when not in use, and the drive mechanism is not exposed to sea water or open air since it is encased within the hull.