How quickly could Rome build quinqueremes?

How long did it take to build a quinquereme?

The exact time for one ship is debated, but Rome produced about 200 quinqueremes in parallel in less than twelve months.

A quinquereme displaced roughly 100 tons, but estimates for a single ship's construction time vary. The clearer evidence is programme scale: Rome decided on the replacement fleet in 243 BC and sent it to sea in 242 BC. That implies roughly 200 quinqueremes were completed in under a year through parallel construction, rather than one ship requiring the entire period.