I like both of these. I especially like the way the vessel appears rock solid and stable, and the ocean is doing all the gyrating. The opposite of my experience on the water!
Thanks for all the really nice comments. Very encouraging.
Mike c: The weather on this particular day was not too rough, I was down the back of the ship where the wash from the hull is quite dramatic at full speed. I have done these long exposures before (in digital) in incredibly rough weather and had great results. I just hold the tripod very firmly with my hand during the exposure. I've found that 1/2 second or there abouts is sufficient for a really nice image. Captures the drama of the water movement without making it too transparent. If you are interested in seeing the digital ones you can check here: http://www.flickr.com/photos/alexgard/sets/72157640896155114/