Hi!
Welcome to the SB. Sorry for late comment (that applies also to Your entry in Beginner's Forum).
It's a nice start, but these works have some quite significant issues.
On a formal level: the scale bar looks rather "fuzzy", there's an orange "frame" all around the template and the shipbucket logo in the bottom right corner is not the original one. Correct SB-scale templates can be found here:
http://shipbucket.com/wiki/index.php/Category:Templates
Second thing is the shading: overhangs are marked even too strongly, but there's no highlight shade (showing parts that are facing towards the - implied - source of light, meaning roughly the upper right corner) nor shading showing curvature of relevant parts.
And another very important thing is the overuse of black. To begin with, the actual "black" is used ONLY for contours and the like. The "black paint" is a separate thing and a very dark grey is used instead. Also, the breaks in surface that are not at a right angle (or are simply an external contour) ought to be marked in dark shade of the color in which said element is painted. Finally, the lines, ropes, wire antennas, but also sold things that are +/- less than 15 cm (6 inches) in diameter are represented in dark grey (or other, relevant color) instead of black. Certainly the flaglines MUST NOT be black (meaning NOT the "contour black").
Last but not least, You have some "heavy corners".
http://shipbucket.com/styleguide