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The trireme, a three-ranked galley with one man per oar, was the main Hellenistic warship up to and into the 4th century BC. At that time, a requirement for heavier ships led to the development of "polyremes" meaning "many oars", applied to "fours" ( tetre- in Greek, quadri- in Latin) or more [ 4 ] and "fives" ( penta- in Greek, quinque- in ...
The trireme derives its name from its three rows of oars, manned with one man per oar. The early trireme was a development of the penteconter, an ancient warship with a single row of 25 oars on each side (i.e., a single-banked boat), and of the bireme (Ancient Greek: διήρης, diērēs), a warship with two banks of oars, of Phoenician ...
Fixed telephone lines per 100 inhabitants, 1997–2007. Cross section of telephone cable of 1,800 twisted pairs, 1922. A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [1] It is designed to reproduce speech of a quality that is understandable. [2]
In fresh water terminology, "rowing" is the use of one oar per person, whilst "pulling" denotes each person using two oars. [1]: 135 Traditional boats propelled by oar are fitted with thwarts - seats that go from one side of the hull to the other, as well as forming part of the hull structure. A boat that is "double banked" has two crew members ...
The number of oarsmen per oar rose from three up to five and in some of the largest command galleys, there could be as many as seven to an oar. [ 161 ] An engraving from 1643 by Claude Barthelemy Morisot showing the layout of rowing benches as well and placement of rowers on a galley with 16 pairs of oars.
Man rowing in slow pace typical for long distances. In rowing (sport), the stroke is the action of moving the oar through the water in order to propel the boat forward. The two fundamental reference points in the stroke are the catch where the oar blade is placed in the water, [1] and the extraction (also known as the 'finish', 'release' or 'tapping down') where the oar blade is removed from ...
In computer graphics, a line drawing algorithm is an algorithm for approximating a line segment on discrete graphical media, such as pixel-based displays and printers.
When the rower uses one oar on one side, it is called sweep rowing that the single oar is called a "sweep" oar. [1] When the rower uses two oars at the same time, one on each side, it is called sculling, and the two oars are called a pair of "sculls". Typical sculls are around 284 cm - 290 cm in length — sweep oars are 370 cm - 376 cm.