navigation
navigationcan be defined as the art of taking a ship successfully from one chosen point to another. From a very early stage the relatively calm, tideless waters of the Mediterranean encouraged travel by sea. Seagoing ships were not normally used in the winter months, because storms and poor visibility made navigation hazardous, but Hesiod's suggestion that sailing be limited to July and August is overcautious (Hesiod Opera et Dies 663–5), the period between the vernal and autumnal equinoxes being the best season, with some leeway at either end. Ancient vessels were either paddled, rowed, or sailed. Their speed depended upon size, type of propulsion, and the weather. Sailing speeds of between four and six knots seem to have been the norm with favourable winds. Light or unfavourable winds might reduce speed to less than one knot, making it preferable to lie up and wait for a change in the weather.
Ancient seafarers guided...
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