May I dare a few comments.
1) Size. Not everyone on this sight has 19` monitor. Although it is recommended to size pictures 800 pix longest side, I`d say 600-650 pix should be the optimal size. Otherwise some people won`t see the whole picture and thus receive the full impression.
2) Horison. Landscape photography requires as a MUST that horizon is:
firstly - even (especially on seascape photos);
secondly - not in the middle of the image. The optimal ratio between scy and land/sea/mountains/forest/whatsoever is 2:1 or 1:2.
3) Composition. Classical composition rules require that the main object of the image (in this case - the sail) should not be in the middle of the picture. Optimal positioning is in the point that is the cross of vertical and horizontal lines splitting the picture at the ratio 3:5 (or 5:3).
4) Technics. In water photography (especially in the day time) you always have to manage one problem - reflection of the light from the water. Actually it is a general problem when making pictures of any polished reflecting surface (glass, metall, water, etc.) The solution is quite simple - use polarization filter (PL filter). It doesn`t change the colour or amount of light the film receives, but surpresses only reflected light. So I recommend you buy one (ore one for each of your lences).
Take care, Oscars. And go on shooting nice pictures.