A Great Dromon Bireme
The Dromonds or Dromons (W."Dromund") originally were galleys of Númenórean design.They were later used by the Black Númenóreans, the Corsairs of Umbar and coastal Haradrim. Dromons could either be Monoremes (for Example Coastal raiders), Biremes (often Merchant Dromons or later also Triremes (heavy War Dromons).