What is the top speed of the trireme ship?

The top speed of a trireme ship, an ancient Greek warship, could reach approximately 9 to 10 knots (about 10 to 12 miles per hour or 16 to 19 kilometers per hour) under ideal conditions. This speed was achieved through the coordinated rowing of its three tiers of oarsmen. However, maintaining such speeds for extended periods was challenging due to the physical demands on the crew.