Re: pontoon boat on ruff water?
What is ruff water, are we talking 2'-3' waves or 4'-5' waves, if it is the 2'-3' variety you should be alright but you will get tossed around a bit in a smaller toon like an 18, as Rancher said, pontoons are wavepiercing hulls so they tend to go through rather than over waves so now and again you will get water over the deck, not a problem other than getting the carpet wet.
I have been on a local lake that gets really torn up with 3'-4' waves in all directions and the toon I was on ran beautifully btu it was a 25'er witha 250 on it,and again at anchor even the big boat got tossed around.