The Greek ruler Ptolemaĩos Philopátōr had 4000 rowers for his ship.
Depends on the type of ship. I assume you mean the most well known ship: the Trireme. These would have had around 170 rowers, spread out over three decks.
team of rowers
Appropriate collective nouns are a galley of rowers or a team of rowers.
A galley is a type of ship that is propelled by rowers. The galley originated in the Mediterranean region and is utilized for warfare, trade and piracy.
A rowers tool would be an oar.
It depends on the size of the ship. There were small(er) ships that typically had spots for about 30 to 40 rowers, but there were some very large longships that were built. The Norwegian King Olav Tryggvason's ship the Ormen Lange, was a particularly large specimen, with room for 64 rowers. There was room for passengers and cargo, however, so just because it held x so many rowers doesn't mean that was all the people it held. Ships were built for different specifications and purposes.
The trireme was a Greek ship that used 3 vertical rows of rowers to attain naval speeds unheard of in that day- 8-9 mph. A percussion instrument and training would keep the rowers in time- something vital for the amount of oars in a tight space. The trireme would not be rowed by soldiers, but by trained rowers. Even with this extra weight, the boat would still out-perform any other boat out there.
The noun crew is functioning as the collective noun in 'a crew of rowers'.
It is the coaches of the rowers giving encouragement and advice to the rowers.
Tori Murden McClure has written: 'I had to row across the ocean' -- subject(s): Biography, Rowing, Women rowers, Rowers 'American Pearl' -- subject(s): Biography, Rowing, Women rowers, Rowers, OverDrive, Biography & Autobiography, Nonfiction
A chest, where they also kept their things.