Akation

Akation - a variant of the Lembos. Not as fast on the high seas, but can be built in vast numbers albeit at a higher Wood cost.

Background
Mention "classical age navy" to a layman, and the next word that pops up to mind usually is either "trireme" or "trieres". But in spite of the power such warships possessed in their heyday (not to mention prestige), for most Greek polities too poor to raise a trireme fleet, there were smaller and lighter ships, such as the akation and the mydion. These were usually relatively small ships with good cargo capacity, but were still fast enough to fulfill the need for fast oarwork where Triremes were too costly or too slow for use on the high seas, the greater number of oars notwithstanding. Over the centuries, they evolved into several newer variants, most notably the lembos or the liburna in Italy and the Balkans, as well as the haemiolia class in later centuries.