Final Flashcards
The slightly upward convexity in the main deck
Camber
The vertical distance from the projected line of top of deck to waterline
Freeboard
The outward curve perpendicular to the vessel
Flare
The vertical distance from the keel to the waterline
Draft/draught
The vertical distance from the keel to the line of top deck
Depth
Draft+freeboard =
Depth
The extreme width of a ship
Beam
The inclination inward from the waterline; the difference between beam at waterline and beam at main deck
Tumble home
The height to which a vessel’s frame rises from the horizontal
Dead rise
A vertical line usually at the after end of the rudder post, if no rudder post the center of the rudder stock
After perpendicular
The curved section between the bottom in the side of the ship to which all water drains
Bilge
The longitudinal vertical plane of a vessel
Centerline
The total weight of cargo fuel water stores passengers and crew that a ship can carry
Deadweight
The height of the ship at the midship section from the baseline to the molded line of the deck at the side
Depth
The total weight of a ship when a float including everything on board
Displacement
Compartments at the bottom of the ship between the inner and outer bottoms used for ballast tanks water fuel oil etc.
Double bottom
Vertical line through the intersection of the stem with the load water line
Forward perpendicular
Inside of a hull, cargo space
Hold
The plating the forms the upper surface of the double bottom a.k.a. tank top
Inner bottom
A Mark on a ship that indicates maximum allowable draft
Plimsoll mark
Vertical structural supports
Stanchions
The vertical deflection of a ships hull where the hull is bent upwards of midships
Hogging
Vertical deflection of a ships hull where the hull is bent downward amidships
Sagging
Hogging and sagging are caused by
Cargo distribution and or the way the ship is supported by a wave
What causes stress on a ships structure?
Weight vs Buoyancy
Name the three types of stress
Compression tension and Shear
Dimensions of structural members are
Scantlings
What motions in a seaway are rotational
Roll
Pitch
Yaw
What motions in a seaway are linear?
Heave
Surge
Sway
Pound
What motions in the seaway are on the longitudinal axis
Roll and surge
What motions in the seaway are on the transverse axis
Pitch and sway
What motions in the seaway are on the vertical axis
Pound heave and yaw
A continual worsening of list or trim indicates
Progressive flooding
What is the main purpose of closing appliances
To ensure water tight integrity
What are three ways to control progressive flooding?
Maintain water type boundaries, pump out flooded compartments, and repair hull damage above the waterline
The watertight bulkhead near the bow of the ship a.k.a. for peak bulkhead
Collision bulkhead
