trierarch
Noun
Meaning
The commander of a trireme.
At Athens, one who (singly, or jointly with other citizens) had to fit out a trireme for the public service.
Source: Webster's dictionaryExamples
Fields (2007), p.15 The hoplites belonged to the middle social classes, so that they came immediately next to the trierarch in status aboard the ship.
Hanson (2006), p. 259 Trierarch The ship's captain was known as the trierarch (triērarchos).