Ships Construction Flashcards
What is Sheer
Sheer refers to the upward curve of a ships deck from midships towards the fwd & aft ends of the vessel. it is used for increasing reserved buoyancy at the ends of the vessel.
What is Flare
Flare is the widening of the ships hull vertically. It enhances reserve buoyancy and reduces pitching motions
What is bulwark?
The ships side above the weather deck
What is forefoot?
The lower end of a ships stem which curves to meet the keel.
What is Freeboard deck?
The height of the highest continuous deck above the waterline at any point along the hull.
What is Draught?
The depth of the keel below the waterline at any point along the hull.
What is the Beam?
The greatest width of the hull
What is the Camber?
The curve given to the surface of decks so that the water will drain away to the sides
What is the Bilge?
The nearly flat part of the bottom of the hull both inside and outside the ship
What is the bilge keel?
A long projecting fin welded onto the sides of a ships bottom to decrease the rolling of a ship.
What is a Tumblehome?
When the ships side curves or slopes inward above the waterline they are said to tumble home
What is the Flush Deck?
When the uppermost deck in a ship is continuous from stern to stern unbroken by any raised or sunken portion
What is freeboard?
Freeboard is the distance measured vertically downwards amidships from the upper edge of the freeboard deck to the upper edge of the loadlines
What is the Keel?
a long, central beam running along the bottom of the ship from the bow to the stern. It provides Structural backbone for the vessel as-well as increased stability & hydrodynamics. they can also be used to hold ballast.
What are the Beams?
the horizontal structural elements that extend across the width of the ship, from one side to the other. They are used for structural support, increased stability, deck support and connection point to other ships structural components.
What are the Girders?
girders are longitudinal structural components that run along the length of the ship, providing additional strength and rigidity to the hull. They provide structural support, deck reinforcement, load distribution and hull integrity
What are the Frames?
frames are transverse structural components that run across the ship from one side to the other, forming the skeleton of the hull. They provide a structural skeleton (rib-like) , load distribution, hull support, reinforcement against hydrodynamic forces and interior support.
What are Freeing Ports?
They are opening in the bulwarks (the sides of the ship above the deck) that allows water to drain off the deck.
What is a hawsepipe?
It is a cylindrical structure through which the anchor chain or cable passes from the deck down to the ship’s exterior.
What is the bitter end?
The bitter end is the final length of the anchor chain, which is attached to a strong point inside the ship, typically in the chain locker, to prevent the entire anchor chain from running out when the anchor is deployed.
What is the chain stopper?
The main function of a chain stopper is to hold the anchor chain in place, taking the load off the windlass (the machinery used to raise and lower the anchor). It ensures that the anchor remains secure once deployed and helps maintain the position of the ship.
What is a fairlead?
The function of a fairlead is to guide and manage the direction of ropes, lines, or cables, reducing friction and wear. It helps in controlling the path of the line to avoid obstructions and minimise potential damage.
What is a bollard?
bollards are sturdy vertical posts or pillars used for mooring and berthing ships. They provide secure attachment points for mooring lines and help maintain the ship’s position alongside docks, wharves, and quaysides.
What is a double bottom?
It is a design feature comprising two horizontal layers at the ship’s bottom, providing enhanced safety, buoyancy, and environmental protection. The space between the layers can be used for ballast, adding to the ship’s stability and operational efficiency.
