What is the Basic Structure of a Ship? Explain Parts Of A Ship

What is the Basic Structure of a Ship Explain Parts Of A Ship - Merchant Navy Info - Blog

A ship is like a floating city made up of several parts of a ship. However, it is impossible to imagine a ship without her three main parts: the hull, the engine room and the navigation bridge. A parts of a ship consists of both visible and invisible parts. For example, rudders, anchors, bows, keels, accommodations, propellers, masts, bridges, hatch bays, and bow thrusters are common parts. In contrast, bulkheads, frames,  holds, bunker tanks, double bottoms, spars, cofferdams, sidewalls, etc.

Are Invisible Parts Of The Ship

Monkey Island: 

Monkey Island is a type of deck located at the highest accessible height of a ship, directly above the bridge.This part of the ship, sometimes called the flying bridge, was once used by sailors for sun and stargazing. Additionally, it also has a built-in magnetic compass.


  1. The bridge is a part of a ship command center.
  2. Control the ship’s movement through navigational equipment.
  3. Controls critical deck machinery, main engines, and also ship navigation systems.


  1. A funnel or chimney is a ship’s chimney used to exhaust engine and also boiler smoke.
  2. The essential purpose of a chimney is to direct exhaust gases away from the deck.


The accommodation area is the base for the crew and their lives.

It has all the facilities: offices, gym, crew cabin, hospital, salon, lounge, common areas, laundry, galley and also more.

Chimney Deck: 

The chimney releases exhaust gasses from the ship’s engine exhaust chamber into the atmosphere. It works similar to a factory chimney. Nowadays, special care is taken when releasing the buds from the hopper to protect the atmosphere from pollution.

Boat Deck: 

  1. The deck floor covers the hull structure.
  2. A ship may have multiple decks or also deck sections.
  3. The top deck that is most exposed to the elements is the main deck or weather deck.
  4. Based on the position of the ship’s deck, there are  six main types of decks: Main deck, aft deck, upper deck, lower deck, weather deck, and also foredeck.


A mast is a long parts of a ship girder assembly mounted approximately perpendicular to the ship’s centerline. Serves several purposes, including transporting drilling rigs, establishing navigation lights, prominent piers, radio or radar antennas, and also base altitude for scanners.

Flying Bridge: 

An extended area on the weather deck or an open area in the superstructure that provides the navigator with an unobstructed view of the front, rear, and sides of the ship.It also serves as an operating station for guard officers and crew.


The front part of the boat or bow is called the ship’s stem.The keel itself extends to the muzzle and forms a curved end called the ship’s stem.


The foredeck is one of the forwardmost parts of a ship and is less than 7% of the total length of the deck. Originally used on warships by soldiers to take defensive positions using the forecastle. The foredeck is the front part of the weather deck between the superstructure and the main superstructure.Basically, the front part of a ship parts mast.

Bow bulge: 

A protruding bulge on the bow just below the W/L.Blocks out water and optimizes water flow around the hull, increasing ship speed, fuel consumption, and stability.


The tail is a rear structure designed for low resistance, high propulsion efficiency, and vibration prevention. It is the rearmost part of a ship that prevents water from entering. The rudder and propeller are suspended at the stern.

 Aft Deck: 

  1. Serves as the roof for the stern cabin.
  2. Makes it easier for the captain and helmsman to supervise the entire crew.
  3. However, in modern ships, the stern deck is located either in the center of the ship or on the starboard side.

Side Thrusters: 

  1. These are similar to propellers and are mounted on each side of the bow.
  2. Useful for maneuvering ships at low speeds in congested waters near ports and canals.
  3. These are also called tunnel thrusters.
  4. Side thrusters have a significant impact on a vessel’s total cost of ownership.
  5. These can be hydraulically or electrically driven.


The propeller drives the ship parts, and the rudder controls the ship because, without steering, you cannot move the vehicle in the desired direction. The rudder is a flat, hollow structure housed behind the propeller. It consists of the following ship parts: Rudder trunk, movable flaps, main rudder blade, hinge system, connections, and rudder support bearing. There are three types of rudders: rudder-balanced type, semi-balanced type, and unbalanced type.


A mechanical device with blades attached to a central shaft.

These rotor blades rotate, and their rotational energy is converted into pressure energy, which causes the propeller to generate the thrust needed for propulsion. It pushes seawater backwards, which helps the ship move forward.

Paint Room: 

  1. Ocean-going ships require a small onboard area for handling and storage of paint.
  2. This room is called the painting room.
  3. Special precautions apply in the painting room to prevent explosions and the release of chemical gases and vapours from the enamel.

Emergency Generator Room: 

In the event of a main power failure, a small separate generator provides power to the emergency load. This is called an emergency generator. It is located on the top deck, away from the main engine, auxiliary equipment, and the collision bulkhead, and has its own control panel around it.

Ballast Tank:   

A compartment specially designed for the transport of water and used to ballast and stabilize a ship is called a ballast tank.Because seawater is highly corrosive, these tanks must be carefully maintained to prevent corrosion.

Bunker Tanks: 

Ship tanks used to store ship fuel and lubricating oil are also called bunker tanks.These lubricants are necessary to make machines operate more safely, and also the fuels are used for emergency or routine operations.

Channel Keel: 

A channel keel is a hollow structure made of two longitudinal beams and also solid plates welded together to form a box-like structure, usually as in double-hulled ships. The channel keel should provide a watertight passage along the length of the vessel. Consists of a monitoring tube for leak detection. Marine Cargo Equipment (Derrick/Crane, etc.

Derricks (cranes) are used to lift and also transport safe working loads onboard ships. Easy to operate as it is an electrically or hydraulically operated device.

Samson Post/King Post: 

A heavy vertical post that supports cargo booms. Placed on top of the keelson to support the ship’s deck beam.

Cargo warehouse: 

An enclosed space used to hold and store cargo or cargo containers containing coal, grain, or also salt is called a cargo hold. The cargo hold is located below the  deck of the ship and also has a carrying capacity of 20  to 200,000 tons.

Hatch Covers: 

Hatch covers are required to prevent damage to cargo, especially to ensure air and water tightness of storage compartments. Generally, this is to protect food (or other cargo) being transported by ship from rain during the voyage.


Freeboard can be defined as the distance from the waterline to the high edge of the freeboard/deck on the mid side of the ship. The classification society must approve the calculation of the vessel’s minimum freeboard.


The hull is watertight and can be open or partially decked.The hull has several watertight decks and also bulkheads as the main diaphragm.

Deck House: 

A house-like structure on the upper deck. Ships, an important source of maritime trade, come in a variety of styles and sizes. Some parts are called essential parts and are common to all ships, while others are just accessories to provide luxury or enhanced transportation. All parts of the ship should be checked for proper functioning, and also precautions should be taken regarding dangerous equipment.

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