week 3 Flashcards
A protruding bulb at the front of a ship below the waterline that reduces water resistance, improving fuel efficiency and speed.
Bulbous Bow
The forward part of the ship’s hull that cuts through the water, designed to minimize resistance and improve stability.
Bow
The vertical or slightly inclined upright at the very front of the ship’s bow, connecting the keel to the bow, providing structural strength.
Stem
A raised deck at the front of the ship, typically housing crew accommodations and storage for equipment such as anchors and mooring lines.
Forecastle
The forward part of the main deck, located near the bow, often used for handling anchors, mooring operations, and access to the forecastle
Foredeck
The front mast on a ship, usually located near the bow, supporting sails (on a sailing ship), antennas, and navigational equipment.
Foremast
A watertight cover used to close the openings of cargo holds on a ship, protecting the cargo from weather and seawater.
Hatch Cover
A mechanical device used on ships to lift, lower, and move heavy cargoes, facilitating loading and unloading operations.
Crane
The large enclosed space within a ship used for storing cargo during transport.
Cargo Hold
The horizontal surface covering a ship’s hull, providing structural support and space for cargo, equipment, and crew activities.
Deck
The watertight outer structure of a ship that provides buoyancy and stability, protecting the interior from the sea.
Hull
A heavy device lowered from a ship to the seabed, used to secure the vessel in a fixed position by gripping the sea floor.
Anchor
The living quarters on a ship, including cabins, mess rooms, and recreational areas where crew members live and work.
Accommodation
The part of the ship above the main deck, including the bridge, accommodations, and other structures that house operational and living spaces.
Superstructure
The compartment where the ship’s main engines, generators, and machinery are located, responsible for propulsion and power generation.
Engine Room
The backbone of the ship, running along the bottom of the hull from bow to stern, providing structural integrity and stability.
Keel
A rotating blade mechanism that propels the ship through the water by converting engine power into thrust.
Propeller
A flat, movable piece at the stern used to steer the ship by directing water flow when turned.
Rudder
The rear part of the ship, opposite the bow, housing the rudder and often the propeller.
Stern
The highest deck at the stern, typically above the main deck, used for observation and sometimes housing navigational equipment.
Poop Deck
A small, sturdy boat carried on a ship, used for emergency evacuations to save lives in case of disaster.
Lifeboat
The deck area surrounding or supporting the ship’s funnel, often used for access to the funnel.
Funnel Deck
The chimney-like structure that vents smoke and exhaust gases from the ship’s engines and boilers to the outside air.
Funnel
The tallest mast on a ship, supporting sails, antennas, and navigational lights, often used for signaling and communication.
Main Mast
A small platform located above the bridge or wheelhouse, often used as an observation deck or for navigational purposes.
Monkey Island
The command center of the ship where navigation, steering, and control operations are managed by the officers on duty.
Bridge
The open extensions of the bridge on either side, providing a clear view for maneuvering and docking operations, often used for navigating in confined spaces.
Bridge Wings
is the primary material used in shipbuilding due to its excellent properties, including high strength, toughness, durability, and weldability.
The types of steel used in shipbuilding are selected based on the specific requirements of different parts of the ship, such as the hull, deck, superstructure, and machinery spaces
Steel
A stands for Standard Structural Grade (36 minimum yield strength of steel)
Application:
This grade is used in general structural applications where high toughness is not a primary requirement. It is typically used above the waterline, where the material is less exposed to harsh conditions.
A36
AH stands for High-Strength Steel with a certain level of toughness.
Application:
The “A” prefix indicates that it is suitable for use in shipbuilding, and the “H” stands for High strength. AH grade steel is used in parts of the ship that are exposed to low temperatures or higher stress, like the hull, where higher strength and toughness are required.
AH36
DH stands for Higher Strength Steel with enhanced toughness at lower temperatures.
Application:
The “D” represents that the steel has better toughness properties than AH grade and is suitable for use in harsher, colder environments, including below the waterline. DH steel is often used in the ship’s hull and other critical areas.
DH36
EH stands for Extra High Strength Steel with the highest level of toughness.
Application:
The “E” prefix indicates that the steel is suitable for even more demanding applications, especially in very cold or harsh environments. EH steel is used in critical structural parts of the ship that experience high stress and exposure to low temperatures, such as in icebreakers or vessels operating in Arctic conditions.
EH36
Standard structural grade for general use
A36
High strength steel suitable for above and below waterline with good toughness.
AH36
Higher toughness and suitable for colder conditions, often below the waterline.
DH36
Extra high toughness for extremely cold or high-stress conditions.
EH36
Mild steel is the most commonly used steel in shipbuilding due to its balance of strength, ductility, and cost-effectiveness.
Commonly used for general structural purposes
Example: Grades like A36 and AH36 are commonly used
Mild Steel (Carbon Steel)
HSLA steel offers greater strength-to-weight ratios compared to mild steel, allowing for lighter, more efficient ship designs without compromising strength.
Provide enhanced strength and toughness for critical ship structures such hull and decks
Examples include DH36 and EH36 grades.
High-Strength Low-Alloy (HSLA) Steel
Stainless steel is highly resistant to corrosion, making it ideal for use inspecialized components such as tanks, piping, and fittings, particularly in chemical tankers and other vessels where corrosion resistance is critical.
It’s often used in conjunction with other steels to enhance the longevity of certain components.
Stainless Steel
Steel with improved resistance to atmospheric corrosion, often used in areas exposed to corrosive environments, such as the deck and superstructure.
CORTEN Steel are used in environments prone to corrosion.
Corrosion-Resistant Steel (CORTEN Steel)
Used in demanding environments, such as offshore platforms and ships that operate in harsh conditions.
Offer superior corrosion resistance and are used in specialized components.
Duplex Stainless Steel
