I'm playing a spell-caster and we're on a ship in a really terrible storm, when (of course) some huge tentacles appear coming up over the side. I tried to cast a spell, and my GM said that I needed to make a concentration check at DC 21, which my first level character would need to be pretty lucky to get off. I'm ok with this, though it is the first game I've been in where they actually bother with concentration checks.
The the archer shoots the thing with his bow. Ummm, what? Mumbling a few words and making gestures with one hand while I'm holding on to the mast with my other arm seems a lot easier (on the badly rolling deck) than using both hands to nock an arrow, draw a bow, and release with anything like aim.
So, is there an equivalent of concentration for using a bow?