This is how I turned my canoe into a rowboat. Rowing is more efficient than single sided paddling, so I end up with a faster boat speed for about the same amount of effort.
Music:
Hammer and a Nail by Vienna Ditto is licensed under a Attribution License. Creative Commons.
http://freemusicarchive.org/music/Vienna_Ditto/Circle/10_Hammer_and_a_Nail
