I have noticed on pictures around on the internet that sometimes when one flies a hull the relative rudder is up, such as in this picture: http://hobiecat.org.uk/photo.php?Image=photo78.jpg&ShortText=&LongText= or in this other one: http://www.hobie-cat.net/site_gb/?phototeque,show_pict,hobie_14,hc14_mg_2.jpg,produits
Is this a technique or it was just by coincidence that the rudder out of the water was up? Can someone explain more on this?