A Great Dromon Bireme
- Length:125-140'
- Beam:18'
- Draft:5'
- Displacement:
175-195 tons
- Freeboard:10'
- Keel:yes
- Construction:caravel
- Strength:moderate
- Deck:75%
- Forecastle:20'
- Midecastle:20'
- Aftercastle:25'
- Ram:prow
- Steering:oar
- Total Crew:300-360
- Officers:8-10
- Soldiers:60-70
- Sailors:32-40
- Rowers:200-240
- Turn Radius:250'
- Turn Speed:slow
- Oar Banks:2
- No.Oars:100-120
- Rowers/Oar:2
- Slow Rowing:3.0 kts.
- Fast Rowing:4.5 kts.
- Ramming:6.5 kts.
- Racing:7.5 kts.
- Masts:2
- Sail Type:square(2)
- Slow Sail:2.5 kts.
- normal Sail:4.0 kts.
- fast Sail:8.0 kts.
- max. Sail:10.0 kts.
- Artillery:
two catapults, two ballistae
- Provisions:10 days
- Cargo:
- Notes: On small-scale raids, rowers were freemen. In war fleets,most rowers were slaves and captives.