Laying and retrieving the anchors for oil rigs, dredgers and other offshore floating plants.

Special tugboat called "azimuth sterndrive tug". The thruster are at the stern of the hull.

A heavy construction to secure ropes for mooring and towing on it. You will find it often in pairs. See also Bollard

The towing force produced by a tug pulling against a static bollard. ( in tons or tonnes )

The power generated by diesel engine under test conditions. While this test the engine is coupled to a dynamometer.

Two short pieces of a ropes building a "Y". It is used to make a connection between the tug and the tow. See also Gog rope!

Small winch used for hauling ropes and towlines.

A chaser is used for anchor-handling. With this tool then anchor can located and heave from the bed of the sea.

A conventional tugboat fitted with an steerable azimuth thruster beneath the bow.

The weight in tonnes of cargo, stores, fuel oil, passengers and crew of a ship loaded to its loadline.

A vessel loaded on a barge. Often use when it is too difficult to tow this vessel.

Additional rudders in front of the propellers.

Helmsman stand on to top of the bridge.

Describes the movement of a tugboat which capsized by the action of the towed ship. Means the same like girting.

Arope to control the position of the towline on conventional tugs. Used to prevent the capsizing of the tugboat. Also named Gobrope or Stoprope.

The volume of the hull. 100 cubic feet is 1 gross ton. The formulars which used can be vary between the registration companies.

A light rope to haul the towing line onto the vessel which will be towed.

The theoretical power of a diesel or steam engine.

A rope with a small diameter used to haul the towing line.

Pin which can be erected at the stern bulwark of the tugboat to guide the towing line.

Looks like a small piece of a tube around the propellers to enforce the thurst.

It is a short piece of steel wire at the end of the towing line to prevent this agianst chafing. Also named Pennant.

The distance ( theoretical ) the propeller will go ahead at one rotation.

Fitted a the bow of the hull to enforce the structures. Used to push barges.

a tractor tug with an additional azimuth-thurster instead of the skeg at the stern of the tug. Developed by KoTug.

A band around the hull to protect against damage.

Additonal crew on a towed ship.

A special tugboat from the USA which has two azimuth propellers, one fore and one after. The thrusters are also set one to port and one to starboard beside the midship line.

Help a ship in difficult waters.

A fin beneath the stern part of the hull to improve the course stability and the indirect towing force.

A method to connect to piece of a rope or forming an eye.

A piece of rope in the towline with elasticity to reduce shocks during the tow. This term is also use for a line which prevent against fore or aft movements of a ship at the pier.

see bow thruster, this device is located at the stern of the ship.

Used to secure the towingline for a moment while repairs can do.

Term for the deckshouse with the accomodation, wheelhouse and similar structures onto the deck.

A combination of blocks and ropes to support hauling and heaving.

Protective tubes over the tugboats aftdeck to prevent the line fouling at the deckfittings. Most of these tubes connect the bulwarks at both sides of the ship.

A tugboat which has the propulsion units beneath the bow.

Main control position on a tugboat. (bridge)

A tool for hauling of the towline.

A new tugboat developed by Robert Allan Ltd. which connects the andvantages of ASD and tractor in one tugboat.