Hello, new to this stuff. I recently purchased a cottage and it came with what has turned out to be a couple of sea kayaks and a bunch of old issues of sea kayaker magazine among other things. One of the kayaks is a Dirigo 17 and the other is a McNulty Sea Hunter, about the same legnth. just looking for some info as to what i've got, never kayaked before, own several other boats, canoes stayed mostly on the lake. Niether seem to have a rudder but other than that seem to be pretty complete and functional are the rudders necessary or are they ok without?