For your sailing pleasure - use or ignore as you like!
Here’s a link to a few facts about the
Xebec.
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This might also be of interest.
It’s an Athenian trireme – the page is from a Greek site, but you can still get a sense from the picture how the rowers were placed and where the sailor/soldiers positioned themselves, the captain on his chair, the rudderman, etc. And look at the lovely ram at the front of the ship - just the thing to punch holes in a ship of Gondor.
Trireme
These are the trireme's specs:
Overall length: 37 metres (121 feet)
Overall beam: 5.5 metres (18 feet)
170 oarsmen in 3 files on each side: top file 31, middle and bottom 27 each
Oarsmen spaced at 2 cubits (0.888 metres/2 feet 9 inches)
One man per oar
Oar length 4.2m (13 feet 8”) and 4.0m (13 feet) - short oars at ends of ship
Speed: able to cover 184 sea miles at about 7.5 knots without stopping