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The trireme was a fast attack, light displacement vessel. In order to sustain the bending moments of her considerable length, a tightened rope (hypozomata) was mounted beneath the deck spanning from bow to stern. This was an ingenious way to increase rigidity of the hull. Today in modern construction it is called pre-tensioning. After every ...
Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than 0.6 metres (2.0 ft). The vertical distance between shapes is at least 1.5 metres (4.9 ft). Vessels of less than 20 metres (66 ft) length may use shapes of smaller size commensurate with the size of the vessel. [2]
Square rig uses square sails as the major sails on a vessel. It is common for square rigged vessels to include some fore and aft sails, such as staysails. A mast may be referred to as a square rigged mast where square sails predominate – this would differentiate from other masts on the same vessel being fore-and-aft rigged, for example in a ...
Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called yards and their tips, outside the lifts, are called the yardarms. [1] A ship mainly rigged so is called a square ...
A Bentinck boom is fitted to the foot of the fore-course as a labour saving device when tacking. A small trading brig entering the Bristol Avon, painted by Joseph Walter. A brig is a type of sailing vessel defined by its rig: two masts which are both square-rigged. Brigs originated in the second half of the 18th century and were a common type ...
Clewlines and buntlines are lines used to handle the sails of a square rigged ship. The leechlines are clearly visible running inwards and upwards from the edges of the sail. The buntlines up the front of the sail can be seen too, but their run to the blocks on the shrouds is obscured because the sail is set on a lifting yard.