Why Collision Bulkhead kept at L/20 of the ship? The dimensions of the structural items of a ship, e.g. Since a ship’s hull is symmetrical about the longitudinal centre line, often only the half beam or half breadth at any section is given.

Draft marks represent extreme drafts.ĭepth of vessel at ship’s side from upper deck to lowest point of keel. Taken from the lowest point of keel to the summer load line. The maximum beam taken over all extremities. It promotes dryness and is therefore associated with the fore end of ship The outward curvature of the side shell above the waterline. The vertical distance measured from the waterline to the top of the deck plating at the side of the deck amidships. The inward curvature of the side shell above the summer load line. This is useful dimension to know when dry-docking. The horizontal flat portion of the bottom shell measured to port or starboard of the ship’s longitudinal centre line. This rise is measured at the line of moulded beam The rise of the bottom shell plating line above the base line. Measured as the height of deck above the height of deck at side Measured as the height of deck at side at any point above the height of deck at side amidshipsĬurvature of decks in the transverse direction. Measured from the base line to the heel of the upper deck beam at the ship’s side amidships.Ĭurvature of decks in the longitudinal direction. The load draft is the maximum draft to which a vessel may be loaded

The distance from the bottom of the keel to the waterline. Measured at the midship section is the maximum moulded breadth of the ship All vertical moulded dimensions are measured relative to this line Length of the vessel taken over all extremities.Ī horizontal line drawn at the top of the keel plate. Point midway between the after and forward perpendiculars The right side of the ship when looking forward The left side of the ship when looking forward That portion of a ship’s hull forward midships. That portion of a ship’s hull abaft midships. The structural body of a ship including shell plating, framing, decks and bulkheads.

Margin plate ship construction