yes, that is correct and i understand the difference. but i don't quite see why it would not be a bad thing to kick an understern rudder too far, even on a surf ski.

greetings,

risto

: Hi Risto,
: I suspect that you are referring to an overstern type rudder.
: Modern surfskis have understern rudders. They are long thin
: boats that are not really designed for quick turning. The image
: below shows some typical configurations. These boats are
: suitable for fast flatwater paddling but their primary design
: function is for fast downwind paddling. The various rudder
: shapes all serve their purpose but I would not expect to see
: anything other than a surf rudder in open ocean conditions. an
: overstern rudder such as used on a sea kayak would be totally
: inadequate.
: the rudder I have for my project is classified as a universal
: rudder.
:
: [IMG]http://i124.photobucket.com/albums/p23/CraigMel/WeedlessRudder.jpg[/IMG]

: cheers