The Greek Diere was an advancement of the Pentekontere. With this ship type however 2 rows of Ruderern were one above the other appropriate on each page, so that the ship could obtain a higher speed and thus a higher force when ramming.
|Length:||21 to 31 meters|
|Width:||3 to 4 meters|
|Number of oarsmen:||50 per page|
|Number of sails:||1|