Quote:
there was not a person in the front. I noticed when the waves caused the bow to lift, the rudder line holes would submerge.
The boat is a tandem and has to balance on its lines with two aboard. We have simple weight balancing guidlines for all tandems when used by a solo pedaler.
http://www.hobiecat.com/kayaking/tandem_capacity_popup.html
It would be impossible to design a tandem mirage that can have a mid seat (balanced solo) position, so the solo user has to sit aft. Balancing weight in the forward seat area is required.
Beyond that, there is a rudder line upgrade you can do to seal the tubes. Starting in mid 2008 we added an "o" ring inside each steering and up/down control line tube. The assembled tubes and spare line is available as a kit # 80020001
There are a number of posts about other solutions including a squirt of silicone, grease into the existing tubes.
The tubes were never intended to be submerged, but we understand that in some conditions this does happen.