Ship Drawing

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Ship Drawing

• Lines Plan of Different Ship Types

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Ship Types Hull Forms

• Ships can be Classified by their usage into

1. Merchant Ships
2. Ferries
3. Service Ships (Tugs)
4. War Ships
5. Luxury and fun Boats

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Ship Types Hull Forms

• Marine Vessels can be Classified by their support
  into

1. Aerostatic Support (Hover Crafts)
2. Hydrodynamic Support ( Hydrofoils Planning
   Hulls)
3. Hydrostatic Support ( SWATH Catamaran
   Ships Submarines)

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Ship Axis

• The x-axis is the length of the ship, from which
  stations are measured.
• The y-axis is the width of the ship, from which
  buttocks are measured.
• The z-axis is the height of the ship, from which
  water planes are measured.

The origin is the intersection of Keel C.L.
A.P.
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Ship Hull Form and Geometry

• Since the ship is a 3-dimensional shape, data
  in x, y
• and z directions is necessary to represent the
  ship hull.
• Table of Offsets
• Lines
• - body plan (front View)
• - shear plan (side view)
• - half breadth plan (top view)

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Half Breadth Plan

• Intersection of planes (waterlines) parallel to
  the baseline (keel).

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Shear Plan

• Intersection of planes (buttock lines) parallel
  to the centerline plan

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Body Plan

• Intersection of planes to define section line.

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Basic Dimensions and Hull Form Characteristics

• LOA(length over all ) overall length of the
  vessel
• DWL(design waterline) water line where the
  ship is designed to
• float
• FP(forward perpendicular) imaginary vertical
  line where the bow
• intersects the DWL
• AP(aft perpendicular) imaginary vertical line
  located at either
• the rudder stock or intersection of the stern
  with DWL

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Basic Dimensions and Hull Form Characteristics

• LBP (length between perpendicular) horizontal
  distance
• from FP and AP
• Amidships the point midway between FP and AP
• Shear longitudinal curvature given to deck

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View of Mid-Ship section

• Depth(D) vertical distance measured from keel
  to deck taken at amidships and deck edge in
  case the ship is cambered on the deck.
• Draft(T) vertical distance from keel to the
  water surface
• Beam(B) transverse distance across the each
  section
• Breadth(B) transverse distance measured
  amidships

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View of Mid-Ship section

• Freeboard distance from depth to draft
  (reserve buoyancy)
• Keel(K) locate the bottom of the ship
• Camber transverse curvature given to deck
  

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Flare
Tumblehome

• Flare outward curvature of ships hull
  surface above the waterline
• Tumble Home opposite of flare

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Drawing Ship Lines
Drawing Lines Plan
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Non Dimensional Offset Table