Trireme

Galley

A Trireme is a type of galley propelled by rowers and is used for warfare, trade and piracy. Galleys have since their first appearance in ancient times been intended as highly maneuverable vessels, independent of winds by being rowed, and usually with a focus on speed under oars. Their profile has therefore been that of a markedly elongated hull with a ratio of breadth to length at the waterline of at least 1:5, and as much as 1:10 with a small draught, the measurement of how much of a ship’s structure that is submerged under water. To make it possible to efficiently row the vessels, the freeboard, the height of the railing to the surface of the water, was by necessity kept low. This gives oarsmen enough leverage to row efficiently, but at the expense of seaworthiness. These design characteristics make the galley fast and maneuverable, but more vulnerable to rough weather. Under oars it can reach a steady 6 knots, or a burst of up to 8 knots. The oars are backed up by square sails that can be rigged, though they require a steady wind to the stern and provide less thrust then the oarsmen can.

Trireme

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