Abstract: A traction arrangement for a tug boat having a towing winch mounted on the aft and/or fore deck and a tow rope connected to the winch and connectable to a vessel being assisted for necessary measures, such as towing, arresting, steering and equivalent. In order to enhance the stability of the tug boat and the towing, steering, arresting and equivalent properties achieved with the tug boat for the vessel to be assisted, the traction arrangement includes a tow arc mounted essentially in a plane of the deck within an area defined with a transverse bulwark in the front part of the front deck of the tug boat or in the rear part of the aft deck. To be mobile along the tow arc, a towing eyelet is arranged, and through which the tow rope from the towing winch passes to the vessel to be assisted. Traction power is transmitted to the tug boat, and which towing eyelet is on each occasion arranged to be positioned according to the towing angle.

Abstract: A tug boat for escort towing and/or harbor use having a towing winch positioned at least on the forecastle. While in escort towing, the tug is intended to improve the steering and arresting properties of a vessel to be assisted by means of a tow rope emitted from the towing winch and connected to the vessel being assisted. In harbor use, the tug boat is applied for ordinary towing and buffer tasks. In order to improve the stability of the tug boat and the towing, steering, arresting and equivalent properties provided with the tug boat in the vessel being assisted, a towing eyelet, through which the traction force of the tow rope connected from the towing winch of the forecastle to the vessel being assisted is transmitted to the tug boat, is positioned depending on the towing angle and in proximity of the deck plane or in the deck plane.