I am not the most experiance sailor, only four years now and mostly weekend type stuff on the bay with the annual trip down the coast. I usally have the choice of what direction I sail {and days} but the other day I didn't. I was sailing around a protected area and needed to sail coarse downwind in a heavy chop. I would guess 4' to 5' and not rolling seas but step and breaking. The winds were 15 knots and gusting. I had the jib furled, main reefed and out about 3/4 to the speaders. I was enjoying surfing the boat a bit but I was aware of the large looking waves to my stern. Keep in mind that I am in a Catalina 27 so even a 5 foot chop looks really big. You may guess what happened next but the rudder lost its bite and whammm,.. the boat heeled so far that the outer boom was wet and I was 90 degrees to the next wave. I was lucky that the boat righted itself quickly and altho nerve racking I finished that leg of the trip without another mishap. Besides going to sailing school or not being in 5 foot chop what advice do you off shore guys have. Should I have been using the jib furled up a bunch or was this kind of thing like hitting a pot hole {sh*&&^t happends}. Thanks for your advice, Jack