Its alright. I think it lacks a style of colour. What I mean is that its black, white, red, yellow and green. Any colours I missed? I think keeping the site to around 2-3 colours is the best thing to do.
First think i noticed is the text is way too big! Big text is a bad idea. I don't like the top header either. Its too plain and the text takes up more of the space. May I suggest maybe adveritsing to fill up that space. Could work.
Also, try matching the colour of the forums aswell.
Like mentioned above... the color scheme didn't really interest me. I also didn't care for the frames. Your sub-pages are not uniformed. Black BG, blue BG, white BG... I feel those pages should all look and feel the same. Take a look at other sites posted on WHT and get some ideas of a layout that flows more. The comment about a submarine image as part of your header is a great idea.