The largest ship ever built is a 40 built by Ptolemy IV. It was about 128 m long, a good 17 m wide and had a height from the waterline to the tip of the stern of a good 24 m.The crew consisted of 4,000 rowers, 400 seafarers and 2,850 marines. The traditional description of this ship suggests that it was a catamaran ship. However, the distribution of the rowers over the assumed three rows of oars is unclear. The known length of the ship allows for 50 oars per row. It is therefore likely that the rowers will be distributed on both sides of the double-hulled catamaran. This would mean 1,000 rowers per hull side, i.e. 4,000 rowers in total. The 50 oars on one side could then have been manned with 20 oars in a Thranite-Cyclite-Thalamite cycle. This is the most believable solution today. The upper deck spanned both hulls and thus had a correspondingly large area to accommodate the combat crew. However, these large galleys had no tactical value and were militarily and economically unjustifiable.