So i'm wondering, would you choose oars or pedals for galleys (assuming modern engines do not work and further assuming you understand the mechanics behind both methods of generating motive force)? A pedal propelled galley would likely be faster - pedal propelled craft are generally 30-40 faster than similar crafts powered by oars, due to your legs being so much stronger, plus a propeller never leaves the water. It would likely be safer for the oarsmen as well, as galleys are built for ramming attacks. I don't think I need to explain how dangerous it is to hold a several meters long oar when the other end of said oar is struck by another ship. On the other hand, pedal propelled craft would likely be more time consuming to build in a medieval setting. The propeller(s) would also be a vulnerability. I'm wondering about the pros and cons as I'm considering returning to an old writing project of mine.