Design Drawing Tugboat (23.50M x 7.32M x 3.20M)


This product consist of a complete Design Drawing and MTO for manufacturing a Tugboat with dimensional size: Length 23.5 M x Width 7.32 M x Height 3.2 M.

Inside this Tugboat design, the Tugboat is using two main propulsion engine: 2x Mitsubishi S6A3-MPTK 600 PS 1910 rpm, with double skeg and not using kort-nozzle on it’s propeller.

A Complete Design Drawing Tugboat (23.50M x 7.32M x 3.20M)

This product consist of a complete Design Drawing for manufacturing a Tugboat with dimensional size: Length 23.5 Meters x Width 7.32 Meters x Height 3.2 Meters. In this Tugboat design, the Tugboat is using two main propulsion engine: 2x Mitsubishi S6A3-MPTK 600 PS 1910 rpm, with double skeg and not using kort-nozzle on it's propeller.

Whether you are a student, college or scholar on engineering subject, this package will be a good items to gain knowledge on designing and fabricating of Steel Tugboat. By having this pack, you will get more reference on a Structural, Mechanical, Piping system, Electrical, Navigation and Safety all aspect that required on a single Ship, and it is with out having to go into a shipyard company to get the data.

What is include in this Design?

Majority this pack contains ship construction drawings, and also estimation of Bills of material required. Below are list of items that are include:

Structural Construction Drawings
  • Ship General Arrangement
  • Ship Lines Plan
  • Profile and Deck (2 pages)
  • Midship Section
  • Bulkhead Section (2 pages)
  • Superstructure Detail
  • Ship Shell Expansion
  • Funnel Detail
  • Bollard Detail
  • Chain And Hawse Pipe
  • Skeg Detail
  • Mast Light Detail
  • Engine Room Layout
  • Welding Schedule
  • NDT Plan
  • Towing Hook Platform Details
  • Zinc Anode Calculation
Piping System Drawings
  • Bilge Ballast, General Service (GS) & Fire main System
  • Domestic Fresh water, Sea water, Sanitary and Drainage
  • Fuel Oil System
  • Engine Cooling System
  • Oily Water Separator
  • Air Vent, Sounding & Filling Detail
  • Position Of Tank Vent, Sounding and Filling
  • Hydraulic Steering Gear Layout
  • Sea Chest Detail
Mechanical Drawings
  • Shafting Arrangement
  • Detail Rudder Assembly
  • Stern Tube Detail
  • Shafting Detail
  • Engine Girder Detail
  • Propeller Details
  • Mitsubishi Marine Engine - S6A3-MPTK ( Specification, Engine foundation drawing, and Engine manuals )
Electrical Drawings
  • Electrical Schematic Wiring Diagram
  • Electrical Load Calculation
Material Requirement (MTO)
  • Bill Of Material Estimation for Hull Structure
  • Bill Of Material Estimation for Piping System
  • Bill Of Material Estimation for Outfitting
Navigation and Safety Equipment
  • List of Navigation, Safety and Fire Fighting Equipment
  • Fire And Life Saving Plan Drawing
Tank Sounding Table

Tank Sounding Table give details Capacity and Sounding levels on each Tank inside Ship Hull, those tank include Ballast water tanks, Fuel oil tanks, Fresh water tank, Fuel oil Daily tank, and Fore water ballast tank.

Ship Particulars

In this Ship Particulars, it has list up every details on the Ship Main Engine, Engine gear box, Genset, Pumps, Windlass, Anchor and Chain, and other equipment used inside the ship.

All drawing are fabrication ready and all Drawing were extracted directly from CAD drawing into pdf files, and can easily convert back into CAD using pdf to CAD online converter. Major update on the drawing is not recommended, however, minor update on Plate thickness, Angle, Flat, or Round Bar use, Girder, Stiffener pipe dimensions and fittings dimension is possible.

What is a Tugboat?

A tugboat is a vessel designed to maneuver other vessels by pulling or pushing them. This movement can be facilitated via direct contact between the tug and the other vessel or by using tow lines.

How Do Tugboats Work?

Tugboats generally work in one of three ways: direct towing, indirect towing, and pushing. Each is used in specific situations and has its unique advantages. Find out about them below.

Direct Towing

This is the simplest type of towing. Quite simply, a towing line attached to a powerful motor is fastened to the vessel being towed. The tug then pulls the ship through the water. This is often used when the vessel is not able to propel itself. Generally, this type of towing happens at low speeds, typically 4-5 knots, and is governed by the bollard pull of the tug.

Indirect Towing

Indirect towing is another way of maneuvering ships using a tow rope, but it differs considerably from direct towing. In this type of towing, the tow rope is attached to the vessel’s stern, which drags the tug. The tug uses thrust to keep a sheered position in relation to its heading, which allows the drag force to be higher than the bollard pull of the tug. Using this method provides more force when turning or decelerating. It generally happens at speeds of 6 knots or greater.


Most commonly used in North America, pushing is exactly what it sounds like. The tugboat pushes the vessel into position, using its impressive power to reposition ships many times larger than itself. Pushing tugs often have an attachment that fits into a specific receptacle of the vessel being pushed, plus tugs of this type are generally built with reinforced hulls.

Types of Tugboats

In general, there are two types of tugboats – escort tugboats and support tugboats. Below, are a little about these two types of Tugboat.

  • Escort Tugboats

Tugs of this type are the most recognizable, as they maneuver and escort vessels in dangerous and coastal waters. The escort tug is required to assist with the steering and stopping of large ships, plus they can also perform routine towing tasks in harbors.

An escort tugboat must have an optimum speed equal to or greater than the maximum speed of the vessel being moved, and it must also be able to carry out duties while moving at these top speeds.

  • Support Tugboats

Support tugboats, as their name suggests, provide support to towing operations. They are primarily used to assist with berthing and unberthing and don’t carry out the heavier work done by escort tugboats – although support tugs are capable of tethered towing of smaller vessels. They can also be used for untethered towing.

It is also possible to find offshore support tugs designed to support offshore operations, such as oil rigs, working in deeper water compared to regular support tugboats. As per regulations, all support tugboats can be used for firefighting purposes.


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