Noun
The commander of a fleet.
Source: Webster's dictionaryThe Spartan navarch Lysander refused to be lured out of Ephesus to do battle with Alcibiades. Source: Internet
However, Spartan law did not allow the reappointment of a previous navarch, so Aracus was appointed as navarch with Lysander as his deputy. Source: Internet
Lysander returns to command The multitude saluted him with loud acclamations After this defeat, Sparta's allies sought to have Lysander reappointed as navarch. Source: Internet