Throughout classical literature the need for skilled rowers is a constant refrain. Three men from different elevations plying about the same length oars would have to maintain a synchronized sweep, always hitting the water, never striking a nearby oar, thus insuring what the Greeks called the “simultaneous hits of the oar” (kôpês xymbolê). Practice in rowing in unison was a constant requirement, and apparently a skill easily lost through inaction. It was not just that rowers had to have strength and learn to row in synchronization; they also had to get used to hitting rough seas with their
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