The penteconter, plural penteconters, was an ancient Greek galley in use since the archaic period.
Coinage of Tennes, king of Sidon, dated 351/0 BC. Phoenician pentekonter sailing left. Date above (here faint), waves below. King of Persia standing right, holding up lion by lock of mane; Aramaic T’ between.
A trireme was an ancient vessel and a type of galley that was used by the ancient maritime civilizations of the Mediterranean Sea, especially the Phoenicians, ancient Greeks and Romans.
Penteconter
…92 and 108 ft) long, approximately 4 m wide, and capable of reaching a top speed of 9 knots (17 km/h; 10 mph). However, a modern reconstruction of a trireme, crewed by modern untrained amateurs, attained that top speed fairly easily on initial sea trials, which implies that the top speed of the pentaconter…
Fleet of triremes made up of photographs of the modern full-sized replica Olympias
Phoenician warship with two rows of oars, relief from Nineveh, c. 700 BC
The Lenormant Relief, from the Athenian Acropolis, depicting the rowers of an aphract Athenian trireme, c. 410 BC. Found in 1852, it is one of the main pictorial testaments to the layout of the trireme.