Blue Marlin Transits Columbia River

08/26/2014
08/26/2014: The Blue Marlin is a semi-submersible heavy lift ship designed to transport very large semi-submersible drilling rigs above the transport ship's deck. This ship can carry a staggering 75,000 tons. [maxgallery id="68912"]  Credit: USCG District 13:8/24/14 According to the Wikipedia entry: Blue Marlin is a semi-submersible heavy lift ship…