Athenian Bireme 1250- 500 B.C.The Bireme was the warship used at the time of the Trojan wars. It had a broad bottom with a shallow draft. Biremes were propelled by two banks of oars and virtually skimmed over the seas. The bow had a portion that protruded out at water level. It is thought that this configuration was intended for ramming and piercing the enemy’s ships hull.This earlier configuration is close to the structure of the boats used by the Greeks to defeat the Persian fleet at Salamis in 480 BC.It is clear from ancient Iconography that the evolution and changes to the configuration of these ships evolved over an extended period of time. The time between the Trojan and Persian wars being approximately 800 years.